Protein Family Models

RHS (Rearrangement hotspot) repeat domain-containing protein comprises multiple tandem 22-residue repeats, the YD-peptide repeats, and is distantly related to the wall-associated protein A (WapA) and may mediate intercellular competition; similar to Escherichia coli protein YbfO and protein RhsE

Date:

2023-06-14

This model represents a conserved unique core sequence shared by large numbers of proteins. It is occasional in the Archaea Methanosarcina barkeri) but common in bacteria and eukaryotes. Most fall into two large classes. One class consists of long proteins in which two classes of repeats are abundant: an FG-GAP repeat (PF01839) class, and an RHS repeat (PF05593) or YD repeat (TIGR01643). This class includes secreted bacterial insecticidal toxins and intercellular signalling proteins such as the teneurins in animals. The other class consists of uncharacterized proteins shorter than 400 amino acids, where this core domain of about 75 amino acids tends to occur in the N-terminal half. Over twenty such proteins are found in Pseudomonas putida alone; little sequence similarity or repeat structure is found among these proteins outside the region modeled by this domain.

Date:

2023-02-23

This HMM describes two tandem copies of a 21-residue extracellular repeat found in Gram-negative, Gram-positive, and animal proteins. The repeat is named for a YD dipeptide, the most strongly conserved motif of the repeat. These repeats appear in general to be involved in binding carbohydrate; the chicken teneurin-1 YD-repeat region has been shown to bind heparin.

Date:

2020-10-23