PROSITE documentation PDOC50213
FAS1/BIgH3 domain profile


The FAS1 or BIgH3 domain is an extracellular module of about 140 amino acid residues. It has been suggested that the FAS1 domain represents an ancient cell adhesion domain common to plants and animals [1]; related FAS1 domains are also found in bacteria [2]. Most FAS1 domain containing proteins are GPI anchored and contain two or four copies of the domain. FAS1 domains of BIgH3 protein mediate cell adhesion throught an interaction with α3/β1 integrin. A short motif (EPDIM), located on the C-teminal side of the fourth domain, is essential for the binding to integrin [3].

The crystal structure of two FAS1 domains (FAS1 3-4) of a fas1 protein have been solved (see <PDB:1O70>) [4]. Each domain consists of seven-stranded wedge and at least five α helices. Two well-ordered N-acetylglucosamine moities attached to a conserved asparagine are located in the interface region between the two FAS1 domains.

Some of the proteins containing a FAS1 domain are listed below.

  • Drosophila fasciclin I (fas1) protein. A cell adhesion molecule involved in axon guidance. It is attached to the membrane by a GPI-anchor (4 copies).
  • Human TGF-β induced Ig-H3 (BIgH3) protein. Mutation in its FAS1 domains result in corneal distrophy, due to the deposition of insoluble protein aggregates (4 copies).
  • Arabidopsis fasciclin-like arabinogalactan proteins (2 copies).
  • Volvox major cell adhesion protein (2 copies).
  • Bacterial immunogenic protein MPT70 (1 copy).
  • Human extracellular matrix protein periostin (4 copies).
  • Mammalian stabilin protein (7 copies).

The profile we developed covers the entire FAS1 domain.

Last update:

May 2003 / First entry.


Technical section

PROSITE method (with tools and information) covered by this documentation:

FAS1, PS50213; FAS1/BIgH3 domain profile  (MATRIX)


1AuthorsHuber O. Sumper M.
TitleAlgal-CAMs: isoforms of a cell adhesion molecule in embryos of the alga Volvox with homology to Drosophila fasciclin I.
SourceEMBO J. 13:4212-4222(1994).
PubMed ID7925267

2AuthorsUlstrup J.C. Jeansson S. Wiker H.G. Harboe M.
TitleRelationship of secretion pattern and MPB70 homology with osteoblast-specific factor 2 to osteitis following Mycobacterium bovis BCG vaccination.
SourceInfect. Immun. 63:672-675(1995).
PubMed ID7822037

3AuthorsKim J.E. Kim S.J. Lee B.H. Park R.W. Kim K.S. Kim I.S.
TitleIdentification of motifs for cell adhesion within the repeated domains of transforming growth factor-beta-induced gene, betaig-h3.
SourceJ. Biol. Chem. 275:30907-30915(2000).
PubMed ID10906123

4AuthorsClout N.J. Tisi D. Hohenester E.
TitleNovel fold revealed by the structure of a FAS1 domain pair from the insect cell adhesion molecule fasciclin I.
SourceStructure 11:197-203(2003).
PubMed ID12575939

PROSITE is copyrighted by the SIB Swiss Institute of Bioinformatics and distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND 4.0) License, see prosite_license.html.


View entry in original PROSITE document format
View entry in raw text format (no links)