PROSITE documentation PDOC01013
Uncharacterized protein family UPF0057 signature


The following uncharacterized proteins have been shown [1] to be evolutionary related:

  • Barley low-temperature induced protein blt101.
  • Lophorium elongatum salt-sress induced protein ESI3.
  • Yeast hypothetical proteins YDL123w, YDR276c, YDR525Bw and YJL151c.
  • Caenorhabditis elegans hypothetical proteins F47B7.1, T23F2.3, T23F2.4, T23F2.5 and ZK632.10.
  • Escherichia coli hypothetical protein yqaE.
  • Synechocystis strain PCC 6803 hypothetical protein ssr1169.

These are small proteins of from 52 to 140 amino-acid resiudes that contains two transmembrane domains. As a signature pattern we selected a region that corresponds to the end of the first transmembrane helix.

Last update:

December 2004 / Pattern and text revised.


Technical section

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

UPF0057, PS01309; Uncharacterized protein family UPF0057 signature  (PATTERN)


1AuthorsRudd K.E. Humphery-Smith I. Wasinger V.C. Bairoch A.
TitleLow molecular weight proteins: a challenge for post-genomic research.
SourceElectrophoresis 19:536-544(1998).
PubMed ID9588799

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