PROSITE documentation PDOC00762
Serum amyloid A proteins signature


The serum amyloid A (SAA) proteins comprise a family of vertebrate proteins that associate predominantly with high density lipoproteins (HDL) [1,2]. The synthesis of certain members of the family is greatly increased (as much as a 1000 fold) in inflammation; thus making SAA a major acute phase reactant. While the major physiological function of SAA is unclear, prolonged elevation of plasma SAA levels, as in chronic inflammation, however, results in a pathological condition, called amyloidosis, which affects the liver, kidney and spleen and which is characterized by the highly insoluble accumulation of SAA in these tissues.

SAA are proteins of about 110 amino acid residues. As a signature pattern, we selected the most highly conserved region, which is located in the central part of the sequence.

Last update:

June 1994 / First entry.


Technical section

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

SAA, PS00992; Serum amyloid A proteins signature  (PATTERN)


1AuthorsMalle E. Steinmetz A. Raynes J.G.
TitleSerum amyloid A (SAA): an acute phase protein and apolipoprotein.
SourceAtherosclerosis 102:131-146(1993).
PubMed ID7504491

2AuthorsUhlar C.M. Burgess C.J. Sharp P.M. Whitehead A.S.
TitleEvolution of the serum amyloid A (SAA) protein superfamily.
SourceGenomics 19:228-235(1994).
PubMed ID8188253

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