HMG (high mobility group) box;

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAY 271
Cdd:pfam00505   1 PKRPMSAFFLFSKEQRAKLKAENPGLKNAEISKILGEKWKALSEEEKKPYEEKAEKEKARYEKEHPEY 68

Chromatin-associated proteins containing the HMG domain [Chromatin structure and dynamics];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1734342233 200 DPNEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYRASLVSKS 279
Cdd:COG5648    67 DPNGPKRPLSAYFLYSAENRDEIRKENPKLTFGEVGKLLSEKWKELTDEEKEPYYKEANSDRERYQREKEEYNKKLPNKA 146

                          90
                  ....*....|....
gi 1734342233 280 PPDQGEAKNTQANP 293
Cdd:COG5648   147 PIGPFIENEPKIRP 160

high mobility group (HMG)-box domain superfamily; The High Mobility Group (HMG)-box is found in a variety of eukaryotic chromosomal proteins and transcription factors. HMGs bind to the minor groove of DNA and have been classified by DNA binding preferences. Two phylogenetically distinct groups of Class I proteins bind DNA in a sequence specific fashion and contain a single HMG box. One group (SOX-TCF) includes transcription factors, TCF-1, -3, -4, and also SRY and LEF-1, which bind four-way DNA junctions and duplex DNA targets. The second group (MATA) includes fungal mating type gene products MC, MATA1 and Ste11. Class II and III proteins (HMGB-UBF) bind DNA in a non-sequence specific fashion and contain two or more tandem HMG boxes. Class II members include non-histone chromosomal proteins, HMG1 and HMG2, which bind to bent or distorted DNA such as four-way DNA junctions, synthetic DNA cruciforms, kinked cisplatin-modified DNA, DNA bulges, cross-overs in supercoiled DNA, and can cause looping of linear DNA. Class III members include nucleolar and mitochondrial transcription factors, UBF and mtTF1, which bind four-way DNA junctions.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 1734342233 206 KPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEY 264
Cdd:cd00084     1 RPLSAYLLFSKEKRPKLKKENPDLSFTEISKLLGERWKELSEEEKQPYEEKAKEDKERY 59

high mobility group (HMG)-box found in the high mobility group protein 20 (HMG20) subfamily; The HMG20 subfamily includes HMG20A and HMG20B. HMG20A, also called HMG box-containing protein 20A, HMG domain-containing protein 1, HMG domain-containing protein HMGX1, HMGXB1, or iBRAF, is a chromatin-associated protein involved in neuronal differentiation and maturation. It is required for SNAI1-mediated epithelial to mesenchymal transition. HMG20A acts as an inhibitor of HMG20B. HMG20B, also called SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily E member 1-related, SMARCE1-related protein (SMARCE1R), BRCA2-associated factor 35 (BRAF35), HMG box-containing protein 20B, HMG domain-containing protein 2, HMG domain-containing protein HMGX2, Sox-like transcriptional factor, or structural DNA-binding protein BRAF35, is a DNA binding factor that acts as a repressor of erythroid differentiation. It is required for correct progression through the G2 phase of the cell cycle and entry into mitosis. It is also required for RCOR1/CoREST mediated repression of neuronal specific gene promoters. HMG20B is a core subunit of the Lys-specific demethylase 1/REST co-repressor 1 (LSD1-CoREST) histone demethylase complex. Both HMG20A and HMG20B contain one HMG-box.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYRAS 274
Cdd:cd21980     2 PKAPLTGYVRFLNERREKLRAENPDLSFPEITKILGAEWSSLSAEEKQKYLDEAEKDKERYVKELEAYQQT 72

first high mobility group (HMG)-box found in Arabidopsis thaliana high mobility group B protein 6 (HMGB6) and similar proteins; HMGB6, also called nucleosome/chromatin assembly factor group D 06 (or D 6), WRKY transcription factor 53 (WRKY53), or WRKY DNA-binding protein 53, is a master regulator of age-induced leaf senescence. It acts in a complex transcription factor signaling network regulating senescence specific gene expression; hydrogen peroxide might be involved in signal transduction. The subfamily also includes Arabidopsis thaliana HMGB13 (also known as nucleosome/chromatin assembly factor group D 13). Both HMGB6 and HMGB13 contain three HMG-box domains. This model corresponds to the first one.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 205 QKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd22006     1 KKPKTAYFLWCKDQREEVKKENPNADFSEVSKILGAKWKNLSEEEKKPYEEKYKEEKEKYLKVVGEEK 68

second high mobility group (HMG)-box found in the high mobility group protein B (HMGB) family; HMGB proteins are chromatin-associated nuclear proteins that act as architectural factors in nucleoprotein structures, which regulate DNA-dependent processes including transcription. In mammals, four family members are present: HMGB1, HMGB2, HMGB3 and HMGB4. They regulate the expression of a wide range of genes through architectural remodeling of the chromatin structure. HMGB1, also called high mobility group protein 1 (HMG-1), is a prototypical alarmin or damage-associated molecular pattern (DAMP) molecule when released from cells. It plays important roles in the regulation of a wide range of processes, including transcription, replication, DNA repair, and nucleosome formation, in the nucleus. It also plays multiple roles in regulating inflammation and responses to cell and tissue stress. HMGB2, also called high mobility group protein 2 (HMG-2), has been implicated in numerous cellular processes, including proliferation, differentiation, apoptosis, and tumor growth. It acts as a chromatin-associated nonhistone protein involved in transcriptional regulation and nucleic-acid-mediated innate immune responses in mammalian. It binds DNA to stabilize nucleosomes and promote transcription. HMGB3, also called high mobility group protein 2a (HMG-2a), or high mobility group protein 4 (HMG-4), is an X-linked member of HMGB family and functions as a universal sentinel for nucleic acid-mediated innate immune responses. HMGB3 has been implicated in the regulation of cellular proliferation and differentiation, as well as inflammatory response. HMGB4 is expressed by neuronal cells and affects the expression of genes involved in neural differentiation. It is a factor that regulates chromatin and expression of neuronal differentiation markers. The family also includes high mobility group protein B1 pseudogene 1 (HMGB1P1) and nuclear auto-antigen Sp-100. HMGB1P1, also called putative high mobility group protein B1-like 1 (HMGB1L1), or putative high mobility group protein 1-like 1 (HMG-1L1), is an HMG-box containing protein that binds preferentially single-stranded DNA and unwinds double-stranded DNA. Sp-100, also called nuclear dot-associated Sp100 protein, or speckled 100 kDa. It is a tumor suppressor that is a major constituent of the promyelocytic leukemia (PML) bodies, a subnuclear organelle involved in many physiological processes including cell growth, differentiation and apoptosis. Through the regulation of ETS1, Sp-100 may play a role in angiogenesis, controlling endothelial cell motility and invasion. It may also play roles in the regulation of telomeres lengthening, TP53-mediated transcription, FAS-mediated apoptosis, etc. In addition, the family includes Drosophila melanogaster high mobility group protein DSP1 (dDSP1) and similar proteins. dDSP1, also called protein dorsal switch 1, is a Drosophila HMG1 protein that binds preferentially single-stranded DNA and unwinds double-stranded DNA. It converts Dorsal and nuclear factor (NF)-kappa B from transcriptional activators to repressors. Members of the HMGB family contain two HMG-box domains. This model corresponds to the second one.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 1734342233 202 NEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd21979     1 NAPKRPPSAFFLFCSEHRPKIKGEHPGLSIGDVAKKLGEMWNNTSAKDKQPYEKKAAKLKEKYEKDIAAYR 71

third high mobility group (HMG)-box found in Arabidopsis thaliana high mobility group B protein 6 (HMGB6) and similar proteins; HMGB6, also called nucleosome/chromatin assembly factor group D 06 (or D 6), WRKY transcription factor 53 (WRKY53), or WRKY DNA-binding protein 53, is a master regulator of age-induced leaf senescence. It acts in a complex transcription factor signaling network regulating senescence specific gene expression; hydrogen peroxide might be involved in signal transduction. The subfamily also includes Arabidopsis thaliana HMGB13 (also known as nucleosome/chromatin assembly factor group D 13). Both HMGB6 and HMGB13 contain three HMG-box domains. This model corresponds to the third one.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 1734342233 200 DPNEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd22008     6 DPNKPKKPASSYLLFGKEYRKKLQEERPGANNATVTALISLKWKELGEEEKQVYNDKAAVLMEKYKKEVEEYN 78

high mobility group (HMG)-box found in SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily E member 1 (SMARCE1) and similar proteins; SMARCE1, also called BRG1-associated factor 57 (BAF57), is a ubiquitously expressed protein involved in transcriptional activation and repression of select genes by chromatin remodeling. It is a component of SWI/SNF chromatin remodeling complexes that carry out key enzymatic activities, changing chromatin structure by altering DNA-histone contacts within a nucleosome in an ATP-dependent manner. SMARCE1 has a single HMG domain that displays non-specific DNA-binding characteristics. It also contains a kinesin-like coiled-coil (KLCC) domain.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1734342233 200 DPNEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAY 271
Cdd:cd21983     1 PPKPPEKPLMPYMRYSRKVWDQVKASNPDLKLWEIGKIIGQMWRELSDEEKQEYIEEYEAEKVEYEEQMKAY 72

HMG-box domain; This short 71 residue domain is an HMG-box domain. HMG-box domains mediate re-modelling of chromatin-structure. Mammalian HMG-box proteins are of two types: those that are non-sequence-specific DNA-binding proteins with two HMG-box domains and a long highly acidic C-tail; and a diverse group of sequence-specific transcription factor-proteins with either a single HMG-box or up to six copies, and no acidic C-tail.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 1734342233 201 PNEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEY 264
Cdd:pfam09011   1 PNKPKRARNAYAFFVQEMIPEHKRQNPVIGFAEVSKLCSERWKNLSEEEKEKYEEMAKEDKNRY 64

high mobility group protein; Provisional

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 1734342233 200 DPNEPQKPVSAYALFFRDTQAAIKGQNP--SATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:PTZ00199   19 DPNAPKRALSAYMFFAKEKRAEIIAENPelAKDVAAVGKMVGEAWNKLSEEEKAPYEKKAQEDKVRYEKEKAEYA 93

first high mobility group (HMG)-box found in Saccharomyces cerevisiae mitochondrial ARS-binding factor 2 (ABF2) and similar proteins; ABF2 is a close relative of the nuclear, chromosomal high-mobility group protein HMG1 in yeast mitochondria. It specifically binds to the autonomously replicating sequence 1 (ARS1). It might play a positive role in gene expression and replication. ABF2 contains two HMG-box domains. This model corresponds to the first one.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAY 271
Cdd:cd22010     1 PKRPLSAYFLYFQEHRSDFVKENPDAKMTEISKIGGDKWKNLSADDKKKYEDDFQRELSEYQKAKAEF 68

first high mobility group (HMG)-box found in upstream-binding factor 1 (UBF1) and similar proteins; UBF1, also called UBTF, nucleolar transcription factor 1, or auto-antigen NOR-90, is a nucleolar transcription factor that recognizes the ribosomal RNA gene promoter and activates transcription mediated by RNA polymerase I through cooperative interactions with the transcription factor SL1/TIF-IB complex. It binds specifically to the upstream control element. UBF1 contains six HMG-box domains. This model corresponds to the first one. This model also includes the first HMG-box domain of upstream-binding factor 1-like protein 1 (UBTFL1), which contains two HMG-box domains.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 1734342233 201 PNEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd21998     1 PDFPKKPLTPYFRFFMEKRAKYAKKHPEMSNLELTKILSKKYKELPEKKKQKYIQDYEKEKEEYEQKMARFR 72

high mobility group (HMG)-box found in high mobility group protein 20A (HMG20A) and similar proteins; HMG20A, also called HMG box-containing protein 20A, HMG domain-containing protein 1 (HMGXB1), HMG domain-containing protein HMGX1, HMGXB1, or iBRAF, is a chromatin-associated protein involved in neuronal differentiation and maturation. It is required for SNAI1-mediated epithelial to mesenchymal transition. HMG20A acts as an inhibitor of HMG20B.

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 1734342233 200 DPNEPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd22017    17 DSNAPKAPLTGYVRFMNERREQLRAERPDVPFPEITRMLGNEWSKLPAEEKQRYLDEAEKDKERYMKELEQYQ 89

second high mobility group (HMG)-box found in Saccharomyces cerevisiae mitochondrial ARS-binding factor 2 (ABF2), intrastrand cross-link recognition protein (Ixr1) and similar proteins; ABF2 is a close relative of the nuclear, chromosomal high-mobility group protein HMG1 in yeast mitochondria. It specifically binds to the autonomously replicating sequence 1 (ARS1). It might play a positive role in gene expression and replication. Ixr1, also called structure-specific recognition protein (SSRP), is a homolog of the yeast mitochondrial regulator ABF2. It binds to platinated DNA and confers sensitivity to the anticancer drug cisplatin. Both ABF2 and Ixr1 contain two HMG-box domains. This model corresponds to the second one.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEY 264
Cdd:cd22012     2 PKRPASAYFLFAKEVRPKLKEENPNEKYTDITKLISEKWRSLDESEKEPYQEEYEKALEEY 62

first high mobility group (HMG)-box found in mitochondrial transcription factor A (TFA) and similar proteins; TFA, also called TFAM, mitochondrial transcription factor 1 (TF1), transcription factor 6 (TCF-6), or transcription factor 6-like 2, binds to the mitochondrial light strand promoter and functions in mitochondrial transcription regulation. It is a component of the mitochondrial transcription initiation complex, composed of at least TFB2M, TFAM and POLRMT that is required for basal transcription of mitochondrial DNA. TFA is required for accurate and efficient promoter recognition by the mitochondrial RNA polymerase. It can unwind DNA. It bends the mitochondrial light strand promoter DNA into a U-turn shape via its HMG boxes. TFA is required for maintenance of normal levels of mitochondrial DNA and may play a role in organizing and compacting mitochondrial DNA. TFA contains two HMG-box domains. This model corresponds to the first one.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSATFgDVSKIVASMWDSLGEEQKQAYKrktEAAKKEYLKALAAY 271
Cdd:cd21986     1 PKRPLSPYLRFYREQLPSFPAQNPDATT-DLSKRIGERWRELPDSQKKKYQ---DAYKAEWQKYKEEI 64

high mobility group (HMG)-box found in Arabidopsis thaliana high mobility group B protein 1 (HMGB1) and similar proteins; This subfamily contains a group of Arabidopsis thaliana HMGB family proteins, including HMGB1, 2, 3, 4, 5, 7, 12 and 14. They bind preferentially to double-stranded DNA. HMGB1 modulates general plant growth and stress tolerance and confers sensitivity to salt and genotoxic (methyl methanesulfonate, MMS) stresses. HMGB2 and HMGB5 confer sensitivity to salt and drought stresses. HMGB7 is required for karyogamy during female gametophyte development, when the two polar nuclei fuse to form the diploid central cell nucleus. Members of this subfamily contain only one HMG-box domain.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*....
gi 1734342233 206 KPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEY 264
Cdd:cd22005     2 RPPTAFFLFLADFRKTYKKKNPDKSVKAVGKAAGEKWKSMSDEEKAPYVEKAEKEKAEY 60

high mobility group (HMG)-box found in Saccharomyces cerevisiae high mobility group protein 1 (HMO1) and similar proteins; HMO1, also called high spontaneous mutagenesis protein 2 (HSM2), is a DNA-binding protein that is probably part of the rDNA transcription apparatus. It acts synergetically with the RPA49 subunit of RNA polymerase I during rDNA transcription. It may participate in mutagenesis control.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAY 271
Cdd:cd22015     1 PKKPLTPYFAFSNHVRPQLKAERPKASPTEIAEEISERWANLSDEEKQLWEDKYEEEMKEYQKALEAY 68

high mobility group (HMG)-box found in Schizosaccharomyces pombe mismatch-binding protein cmb1 and similar proteins; Cmb1 binds to cytosines in base mismatches and opposite chemically altered guanines. It contains only one HMG-box domain.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSatfGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKAL 268
Cdd:cd22014     1 PKRPPSPFLLFMEEFRRNEDNGKNL---VELSRIAAEAWKNMSEDEKQPYIDRAKELLEEYKKQL 62

high mobility group (HMG)-box found in WD repeat and HMG-box DNA-binding protein 1 (WDHD1) and similar proteins; WDHD1, also called acidic nucleoplasmic DNA-binding protein 1 (And-1), acts as a replication initiation factor that brings together the MCM2-7 helicase and the DNA polymerase alpha/primase complex in order to initiate DNA replication.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 1734342233 203 EPQKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYkrkTEAAKKE 263
Cdd:cd21993     1 ENKKKKSGFQLWLEENRSSIEEENPELSEAEIIKLAMQRFRALPKEEKQKW---NEKAKGD 58

high mobility group (HMG)-box found in HMG box-containing protein 2 (HBP2) and similar proteins; HBP2, also called HMG box transcription factor BBX, or Bobby sox homolog, is a transcription factor that is necessary for cell cycle progression from the G1 to S phase.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 205 QKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd21989     1 RRPMNAFLLFCKRHRSLVRERHPRLDNRGITKILGDWWAVLDPDEKQKYTDLAKQYKEAFMKANPNFK 68

first high mobility group (HMG)-box found in the high mobility group protein B (HMGB) family; HMGB proteins are chromatin-associated nuclear proteins that act as architectural factors in nucleoprotein structures, which regulate DNA-dependent processes including transcription. In mammals, four family members are present: HMGB1, HMGB2, HMGB3 and HMGB4. They regulate the expression of a wide range of genes through architectural remodeling of the chromatin structure. HMGB1, also called high mobility group protein 1 (HMG-1), is a prototypical alarmin or damage-associated molecular pattern (DAMP) molecule when released from cells. It plays important roles in the regulation of a wide range of processes, including transcription, replication, DNA repair, and nucleosome formation, in the nucleus. It also plays multiple roles in regulating inflammation and responses to cell and tissue stress. HMGB2, also called high mobility group protein 2 (HMG-2), has been implicated in numerous cellular processes, including proliferation, differentiation, apoptosis, and tumor growth. It acts as a chromatin-associated nonhistone protein involved in transcriptional regulation and nucleic-acid-mediated innate immune responses in mammalian cells. It binds DNA to stabilize nucleosomes and promote transcription. HMGB3, also called high mobility group protein 2a (HMG-2a), or high mobility group protein 4 (HMG-4), is an X-linked member of the HMGB family that functions as a universal sentinel for nucleic acid-mediated innate immune responses. HMGB3 has been implicated in the regulation of cellular proliferation and differentiation, as well as inflammatory responses. HMGB4 is expressed by neuronal cells and affects the expression of genes involved in neural differentiation. It is a factor that regulates chromatin and expression of neuronal differentiation markers. This family also includes high mobility group protein B1 pseudogene 1 (HMGB1P1) and nuclear auto-antigen Sp-100. HMGB1P1, also called putative high mobility group protein B1-like 1 (HMGB1L1), or putative high mobility group protein 1-like 1 (HMG-1L1), is an HMG-box containing protein that binds preferentially single-stranded DNA and unwinds double-stranded DNA. Sp-100, also called nuclear dot-associated Sp100 protein, or speckled 100 kDa, is a tumor suppressor that is a major constituent of promyelocytic leukemia (PML) bodies, a subnuclear organelle involved in many physiological processes including cell growth, differentiation and apoptosis. Through the regulation of ETS1, Sp-100 may play a role in angiogenesis, controlling endothelial cell motility and invasion. It may also play roles in the regulation of telomere lengthening, TP53-mediated transcription, FAS-mediated apoptosis, etc. In addition, the family includes Drosophila melanogaster high mobility group protein DSP1 (dDSP1) and similar proteins. dDSP1, also called protein dorsal switch 1, binds preferentially to single-stranded DNA and unwinds double-stranded DNA. It converts Dorsal and nuclear factor (NF)-kappa B from transcriptional activators to repressors. Members of the HMGB family contain two HMG-box domains. This model corresponds to the first one.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 204 PQKPVSAYALFFRDTQAAIKGQNPSAT--FGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALA 269
Cdd:cd21978     2 PRGKMSSYAFFVQTCREEHKKKHPNESvnFSEFSKKCSERWKTMSAKEKKKFEDMAKKDKARYEREMK 69

third high mobility group (HMG)-box found in upstream-binding factor 1 (UBF1) and similar proteins; UBF1, also called UBTF, nucleolar transcription factor 1, or auto-antigen NOR-90, is a nucleolar transcription factor that recognizes the ribosomal RNA gene promoter and activates transcription mediated by RNA polymerase I through cooperative interactions with the transcription factor SL1/TIF-IB complex. It binds specifically to the upstream control element. UBF1 contains six HMG-box domains. This model corresponds to the third one.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1734342233 201 PNEPqkPVSAYALFFRDTQAAIKgqnpsaTFGDVSKIVA--SMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYRASLvsk 278
Cdd:cd22000     1 PTKP--PPNGYSLFCAELMKNMK------DVPSTERMVEcsKQWKLLSQKEKDAYHKRCEQKKKQYEIELERFLESL--- 69

                  ....*....
gi 1734342233 279 spPDQGEAK 287
Cdd:cd22000    70 --PEEERER 76

high mobility group (HMG)-box found in sex determining region Y (SRY)-box 7 (SOX7) and similar proteins; SOX-7 is an endothelial-associated transcription factor that acts as a tumor suppressor in a number of cancer types. It binds the DNA sequence 5'-AACAAT-3'. SOX-7 belongs to the group F of SRY-related high-mobility group (HMG) box (Sox) transcription factors.

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1734342233 205 QKPVSAYALFFRDTQAAIKGQNPSATFGDVSKIVASMWDSLGEEQKQAYKRKTEAAKKEYLKALAAYR 272
Cdd:cd22046    13 RRPMNAFMVWAKDERKRLAVQNPDLHNAELSKMLGKSWKALTPSQKRPYVEEAERLRVQHMQDYPNYK 80