Protein Family Models

Date:

2024-08-14

Date:

2024-08-14

Region 4 of sigma-70 like sigma-factors are involved in binding to the -35 promoter element via a helix-turn-helix motif [1]. Due to the way Pfam works, the threshold has been set artificially high to prevent overlaps with other helix-turn-helix families. Therefore there are many false negatives. [1]. 11931761. Structure of the bacterial RNA polymerase promoter specificity sigma subunit. Campbell EA, Muzzin O, Chlenov M, Sun JL, Olson CA, Weinman O, Trester-Zedlitz ML, Darst SA;. Mol Cell 2002;9:527-539. (from Pfam)

Date:

2024-10-16

This probable domain is found in bacterial transcriptional regulators such as DeoR and SorC. These proteins have an amino-terminal helix-turn-helix Pfam:PF00325 that binds to DNA. This domain is probably the ligand regulator binding region. SorC is regulated by sorbose and other members of this family are likely to be regulated by other sugar substrates. (from Pfam)

Date:

2024-08-14

This large family of DNA binding helix-turn helix proteins includes Cro Swiss:P03036 and CI Swiss:P03034. Within the protein Swiss:Q5F9C2, the full protein fold incorporates a helix-turn-helix motif, but the function of this member is unlikely to be that of a DNA-binding regulator, the function of most other members, so is not necessarily characteristic of the whole family [1]. [1]. 20196080. The crystal structure of NGO0477 from Neisseria gonorrhoeae reveals a novel protein fold incorporating a helix-turn-helix motif. Ren J, Sainsbury S, Nettleship JE, Saunders NJ, Owens RJ;. Proteins. 2010;78:1798-1802. (from Pfam)

Date:

2024-10-16

sugar-binding transcriptional regulator similar to Priestia megaterium central glycolytic genes regulator, in the absence of glucose, which represses the transcription of the gapA operon that encodes five key glycolytic enzymes

Date:

2024-07-17