This domain is found in a wide variety of contexts, but mostly occurring in cell wall associated proteins. A lack of conserved catalytic residues suggests that it is a binding domain. From context, possible substrates are hyaluronate or fibronectin ( ...
This domain is found in a wide variety of contexts, but mostly occurring in cell wall associated proteins. A lack of conserved catalytic residues suggests that it is a binding domain. From context, possible substrates are hyaluronate or fibronectin (personal obs: C Yeats). This is further evidenced by [1]. Possibly the exact substrate is N-acetyl glucosamine. Finding it in the same protein as Pfam:PF05089 further supports this proposal. It is found in the C-terminal part of Swiss:O82833, which is removed during maturation ([2]). Some of the proteins it is found in (e.g. Swiss:Q9RL69) are involved in methicillin resistance ([3]). The name FIVAR derives from Found In Various Architectures.
The GA (protein G-related Albumin-binding) module is composed of three alpha helices [1]. This module is found in a range of bacterial cell surface proteins. The GA module from Swiss:Q51911 shows a strong affinity for albumin.