Protein Family Models

This domain is mostly found at the end of the beta propellers (Pfam:PF07494) in a family of two component regulators. However they are also found tandemly repeated in Swiss:Q891H4 without other signal conduction domains being present. It's named after the conserved tyrosines found in the alignment. The exact function is not known. (from Pfam)

Date:

2024-08-14

A large group of two component regulator proteins appear to have the same N-terminal structure of 14 tandem repeats. These repeats show homology to Pfam:PF01011 and Pfam:PF00400 indicating that they are likely to form a beta-propeller. This family has been built with artificially high cut-offs in order to avoid overlaps with other beta-propeller families. The fourteen repeats are likely to form two propellers; it is not clear if these structures are likely to recruit other proteins or interact with DNA. (from Pfam)

Date:

2024-08-14

This domain is found linked to a wide range of non-homologous domains in a variety of bacteria. It has been shown to be homologous to the adenylyl cyclase catalytic domain [1] and has diguanylate cyclase activity [4]. This observation correlates with the functional information available on two GGDEF-containing proteins, namely diguanylate cyclase and phosphodiesterase A of Acetobacter xylinum, both of which regulate the turnover of cyclic diguanosine monophosphate. In the WspR protein of Pseudomonas aeruginosa, the GGDEF domain acts as a diguanylate cyclase, PDB:3bre, when the whole molecule appears to form a tetramer consisting of two symmetrically-related dimers representing a biological unit. The active site is the GGD/EF motif, buried in the structure, and the cyclic dimeric guanosine monophosphate (c-di-GMP) bind to the inhibitory-motif RxxD on the surface. The enzyme thus catalyses the cyclisation of two guanosine triphosphate (GTP) molecules to one c-di-GMP molecule [6,7,8]. [1]. 11119645. GGDEF domain is homologous to adenylyl cyclase. Pei J, Grishin NV;. Proteins 2001;42:210-216. [2]. 11557134. Novel domains of the prokaryotic two-component signal transduction systems. Galperin MY, Nikolskaya AN, Koonin EV;. FEMS Microbiol Lett 2001;203:11-21. [3]. 15063857. Cyclic di-guanosine-monophosphate comes of age: a novel secondary messenger involved in modulating cell surface structures in bacteria?. Jenal U;. Curr Opin Microbiol 2004;7:185-191. [4]. 15075296. Cell cycle-dependent dynamic localization of a bacterial response regulator with a novel di-guanylate cyclase output domain. Paul R, Weiser S, Amiot NC, Chan C, Sch. TRUNCATED at 1650 bytes (from Pfam)

Date:

2024-10-16

ligand-binding sensor domain-containing diguanylate cyclase containing a Y_Y_Y domain, catalyzes the synthesis of cyclic-di-GMP (c-di-GMP) via the condensation of 2 GTP molecules

Date:

2022-11-18

The GGDEF domain is named for the motif GG[DE]EF shared by many proteins carrying the domain. There is evidence that the domain has diguanylate cyclase activity [1][3]. Several proteins carrying this domain also carry domains with functions relating to environmental sensing. These include PleD, a response regulator protein involved in the swarmer-to-stalked cell transition in Caulobacter crescentus[2], and FixL, a heme-containing oxygen sensor protein.

Date:

2021-04-27