Protein Family Models

Date:

2024-08-14

The Mar proteins are involved in the multiple antibiotic resistance, a non-specific resistance system. The expression of the mar operon is controlled by a repressor, MarR. A large number of compounds induce transcription of the mar operon. This is thought to be due to the compound binding to MarR, and the resulting complex stops MarR binding to the DNA. With the MarR repression lost, transcription of the operon proceeds [1]. The structure of MarR is known [2] and shows MarR as a dimer with each subunit containing a winged-helix DNA binding motif. [1]. 9068629. The Salmonella typhimurium mar locus: molecular and genetic analyses and assessment of its role in virulence. Sulavik MC, Dazer M, Miller PF;. J Bacteriol 1997;179:1857-1866. [2]. 11473263. The crystal structure of MarR, a regulator of multiple antibiotic resistance, at 2.3 A resolution. Alekshun MN, Levy SB, Mealy TR, Seaton BA, Head JF;. Nat Struct Biol 2001;8:710-714. (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

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