v5.1.0.3
Cicer data from the Legume Information System
Description | This is a thrombospondin type I repeat (TSR) found in properdin. Properdin, also known as factor P (fP), is a glycoprotein constructed from a common pool of structure units or modules, which are homologous to the thrombospondin type 1 repeat, TSR. It is positive regulator of the complement system that stabilises the alternative pathway C3-convertase C3bBb. Properdin also inhibits the factor H-mediated cleavage of C3b by factor I. In addition, properdin acts as a pattern recognition molecule capable of identifying and interacting with microbial surfaces, apoptotic cells, and necrotic cells [1]. However this role of pattern recognition is controversial [2]. Studies indicate that this domain is a TSR variants. It is present at the N-terminal of properdin and has been denoted as TSR-0. It is suggested that the TSR-0 domain of properdin which possesses only the six Cys residues and no CWR-layered motif (which is usually found in other TSR domains) may constitute a truncated TSR domain [3]. |
Namespace | Repeat |