NupC/NupG family nucleoside CNT transporter such as nucleoside permease NupC, which transports nucleosides with a high affinity except guanosine and deoxyguanosine
nucleoside transporter; The Concentrative Nucleoside Transporter (CNT) Family (TC 2.A.41) ...
176-509
5.21e-171
nucleoside transporter; The Concentrative Nucleoside Transporter (CNT) Family (TC 2.A.41) Members of the CNT family mediate nucleoside uptake. In bacteria they are energized by H+ symport, but in mammals they are energized by Na+ symport. The different transporters exhibit differing specificities for nucleosides. The E. coli NupC permease transports all nucleosides (both ribo- and deoxyribonucleosides) except hypoxanthine and guanine nucleosides. The B. subtilis NupC is specific for pyrimidine nucleosides (cytidine and uridine and the corresponding deoxyribonucleosides). The mammalian permease members of the CNT family also exhibit differing specificities. Thus, rats possess at least two NupC homologues, one specific for both purine and pyrimidine nucleosides and one specific for purine nucleosides. At least three paralogues have been characterized from humans. One human homologue(CNT1) transports pyrimidine nucleosides and adenosine, but deoxyadenosine and guanosine are poor substrates of this permease. Another (CNT2) is selective for purine nucleosides. Alteration of just a few amino acyl residues in TMSs 7 and 8 interconverts their specificities. [Transport and binding proteins, Nucleosides, purines and pyrimidines]
:
Pssm-ID: 273278 [Multi-domain] Cd Length: 401 Bit Score: 488.74 E-value: 5.21e-171
nucleoside transporter; The Concentrative Nucleoside Transporter (CNT) Family (TC 2.A.41) ...
176-509
5.21e-171
nucleoside transporter; The Concentrative Nucleoside Transporter (CNT) Family (TC 2.A.41) Members of the CNT family mediate nucleoside uptake. In bacteria they are energized by H+ symport, but in mammals they are energized by Na+ symport. The different transporters exhibit differing specificities for nucleosides. The E. coli NupC permease transports all nucleosides (both ribo- and deoxyribonucleosides) except hypoxanthine and guanine nucleosides. The B. subtilis NupC is specific for pyrimidine nucleosides (cytidine and uridine and the corresponding deoxyribonucleosides). The mammalian permease members of the CNT family also exhibit differing specificities. Thus, rats possess at least two NupC homologues, one specific for both purine and pyrimidine nucleosides and one specific for purine nucleosides. At least three paralogues have been characterized from humans. One human homologue(CNT1) transports pyrimidine nucleosides and adenosine, but deoxyadenosine and guanosine are poor substrates of this permease. Another (CNT2) is selective for purine nucleosides. Alteration of just a few amino acyl residues in TMSs 7 and 8 interconverts their specificities. [Transport and binding proteins, Nucleosides, purines and pyrimidines]
Pssm-ID: 273278 [Multi-domain] Cd Length: 401 Bit Score: 488.74 E-value: 5.21e-171
Na+ dependent nucleoside transporter C-terminus; This family consists of nucleoside transport ...
364-507
5.60e-59
Na+ dependent nucleoside transporter C-terminus; This family consists of nucleoside transport proteins. Swiss:Q62773 is a purine-specific Na+-nucleoside cotransporter localized to the bile canalicular membrane. Swiss:Q62674 is a a Na+-dependent nucleoside transporter selective for pyrimidine nucleosides and adenosine it also transports the anti-viral nucleoside analogues AZT and ddC. This alignment covers the C-terminus of this family of transporters.
Pssm-ID: 462223 Cd Length: 205 Bit Score: 194.15 E-value: 5.60e-59
nucleoside transporter; The Concentrative Nucleoside Transporter (CNT) Family (TC 2.A.41) ...
176-509
5.21e-171
nucleoside transporter; The Concentrative Nucleoside Transporter (CNT) Family (TC 2.A.41) Members of the CNT family mediate nucleoside uptake. In bacteria they are energized by H+ symport, but in mammals they are energized by Na+ symport. The different transporters exhibit differing specificities for nucleosides. The E. coli NupC permease transports all nucleosides (both ribo- and deoxyribonucleosides) except hypoxanthine and guanine nucleosides. The B. subtilis NupC is specific for pyrimidine nucleosides (cytidine and uridine and the corresponding deoxyribonucleosides). The mammalian permease members of the CNT family also exhibit differing specificities. Thus, rats possess at least two NupC homologues, one specific for both purine and pyrimidine nucleosides and one specific for purine nucleosides. At least three paralogues have been characterized from humans. One human homologue(CNT1) transports pyrimidine nucleosides and adenosine, but deoxyadenosine and guanosine are poor substrates of this permease. Another (CNT2) is selective for purine nucleosides. Alteration of just a few amino acyl residues in TMSs 7 and 8 interconverts their specificities. [Transport and binding proteins, Nucleosides, purines and pyrimidines]
Pssm-ID: 273278 [Multi-domain] Cd Length: 401 Bit Score: 488.74 E-value: 5.21e-171
Na+ dependent nucleoside transporter C-terminus; This family consists of nucleoside transport ...
364-507
5.60e-59
Na+ dependent nucleoside transporter C-terminus; This family consists of nucleoside transport proteins. Swiss:Q62773 is a purine-specific Na+-nucleoside cotransporter localized to the bile canalicular membrane. Swiss:Q62674 is a a Na+-dependent nucleoside transporter selective for pyrimidine nucleosides and adenosine it also transports the anti-viral nucleoside analogues AZT and ddC. This alignment covers the C-terminus of this family of transporters.
Pssm-ID: 462223 Cd Length: 205 Bit Score: 194.15 E-value: 5.60e-59
Na+ dependent nucleoside transporter N-terminus; This family consists of nucleoside transport ...
181-252
1.26e-25
Na+ dependent nucleoside transporter N-terminus; This family consists of nucleoside transport proteins. Swiss:Q62773 is a purine-specific Na+-nucleoside cotransporter localized to the bile canalicular membrane. Swiss:Q62674 is a a Na+-dependent nucleoside transporter selective for pyrimidine nucleosides and adenosine it also transports the anti-viral nucleoside analogues AZT and ddC. This alignment covers the N terminus of this family
Pssm-ID: 460319 [Multi-domain] Cd Length: 73 Bit Score: 99.76 E-value: 1.26e-25
Nucleoside recognition; This region in the nucleoside transporter proteins are responsible for ...
260-358
5.39e-13
Nucleoside recognition; This region in the nucleoside transporter proteins are responsible for determining nucleoside specificity in the human CNT1 and CNT2 proteins. In the FeoB proteins, which are believed to be Fe2+ transporters, it includes the membrane pore region, so the function of this region is likely to be more general than just nucleoside specificity. This family may represent the pore and gate, with a wide potential range of specificity. Hence its name 'Gate'.
Pssm-ID: 429586 [Multi-domain] Cd Length: 101 Bit Score: 64.97 E-value: 5.39e-13
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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Functional characterization of the conserved domain architecture found on the query.
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The table lists conserved domains identified on the query sequence. Click on the plus sign (+) on the left to display full descriptions, alignments, and scores.
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(labeled illustration) Standard Display shows only the best scoring domain model from each source, in each hit category listed below for each region on the query sequence.
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