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- ****************************************************************
- * Gram-positive cocci surface proteins 'anchoring' hexapeptide *
- ****************************************************************
-
- Surface proteins from gram-positive cocci contains a conserved hexapeptide
- located a few residues downstream of a hydrophobic C-terminal membrane anchor
- region which is followed by a cluster of basic amino acids [1]. This structure
- is represented in the following schematic representation:
-
- +--------------------------------------------+-+--------+-+
- | Variable length extracellular domain |H| Anchor |B|
- +--------------------------------------------+-+--------+-+
-
- 'H': conserved hexapeptide.
- 'B': cluster of basic residues.
-
- It has been proposed that this hexapeptide sequence is responsible for a post-
- translational modification necessary for the proper anchoring of the proteins
- which bear it, to the cell wall.
-
- Proteins known to contain such hexapeptide are listed below:
-
- - Aggregation substance from streptococcus faecalis (asa1).
- - C5a peptidase from Streptococcus pyogenes (scpA).
- - C protein alpha-antigen from Streptococcus agalactiae (bca).
- - Cell surface antigen I/II (PAC) from Streptococcus mutans.
- - Fibronectin-binding protein from Staphylococcus aureus (fnbA).
- - Fimbrial subunits from Actinomyces naeslundii and viscosus.
- - IgA binding protein from Streptococcus pyogenes (arp4).
- - IgA binding protein (B antigen) from Streptococcus agalactiae (bag).
- - IgG binding proteins from Streptococci.
- - Internalin A from Listeria monocytogenes (inlA).
- - M proteins from streptococci.
- - Muramidase-released protein from Streptococcus suis (mrp).
- - Protein A from Staphylococcus aureus.
- - Trypsin-resistant surface T protein from streptococci.
- - Wall-associated protein from Streptococcus mutans (wapA).
- - Wall-associated serine proteinases from Lactococcus lactis.
-
- -Consensus pattern: L-P-x-T-G-[STGAVDE]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for C5a peptidase which has L-P-T-T-N-D.
- -Other sequence(s) detected in SWISS-PROT: 87 proteins from archaebacteria,
- eukaryotes, or viruses, but only 17 other prokaryotic proteins.
- -Last update: June 1994 / Text revised.
-
- [ 1] Schneewind O., Jones K.F., Fischetti V.A.
- J. Bacteriol. 172:3310-3317(1990).
-