Browse Text search Protein search Domain search Download User manual Related links Citation & Contact


The OpcA Family [Function: Adhesion] Seed alignment | Full alignment in OMPdb

This family consists of several adhesins found in Neisseria species. OpcA is an integral outer membrane protein from Neisseria meningitidis, the causative agent of meningococcal meningitis and septicemia. It mediates the adhesion of Neisseria meningitidis to epithelial and endothelial cells by binding to vitronectin and proteoglycan cell-surface receptors. The crystal structure of OpcA has been determined to 2.0 A resolution, showing a 10-stranded ß-barrel structure with extensive loop regions that protrude above the predicted surface of the membrane. Loops 2, 3, 4 and 5 associate to form one side of a crevice in the external surface of the structure, the other side being formed by loop 1. OpcA is one of the Major Outer Membrane Proteins and has been shown to play an important role in meningococcal adhesion and invasion of both epithelial and endothelial cells.


Specify pHMMs' % coverageUnspecified More than   
Representative image:  fam_img

Literature references

Identification of opcA gene in Neisseria polysaccharea: interspecies diversity of Opc protein family
Gene. 2003 Mar 27;307:31-40. doi: 10.1016/s0378-1119(02)01208-8.
PMID: 12706886

Crystal structure of the OpcA integral membrane adhesin from Neisseria meningitidis
Proc Natl Acad Sci U S A. 2002 Mar 19;99(6):3417-21. doi: 10.1073/pnas.062630899. Epub 2002 Mar 12.
PMID: 11891340

Proteins in this family with 3D-structure

Q51227

Q9AE79


Elixir UTH dib compgen