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We are deeply saddened by the passing of Amos Bairoch (1957–2025), the creator of PROSITE. We wish to dedicate our latest paper, published shortly before his death, to him. He will always be a source of inspiration to us.
Our deepest condolences go out to his family and friends, and to all those who had the privilege of working with him. Rest in peace, Amos. Your work will live on long after you are gone.
Amos Bairoch

PROSITE documentation PDOC51534
SEFIR domain profile


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PURL: https://purl.expasy.org/prosite/documentation/PDOC51534

Description

The SEFIR domain (after SEFs and IL17Rs) is a conserved sequence segment identified in transmembrane receptors (including SEFs, IL17Rs) and soluble factors (including CIKS/ACT1) in eukaryotes and bacteria. In addition to the SEFIR sequence homology, SEFs and IL17Rs share the same architecture. Their extracellular regions are sequentially divergent but appear structurally similar to a tandem fibronectin 3 (FN3)-like domain arrangement. A single transmembrane region is followed by a high-complexity sequence region involving the SEFIR domain and a C-terminal tail that is enriched with polar residues and, sometimes, with low complexity regions [1].

The SEFIR domain is related to the TIR domain (see <PDOC50104>). The SEFIR domain is similar to the TIR domain in length and secondary structure. The similarity between the SEFIR and TIR domains involves the conserved boxes 1 and 2 of the TIR domain that are implicated in homotypic dimerization, but there is no sequence similarity between SEFIR domains and the TIR sequence box 3 [1].

The profile we developed covers the entire SEFIR domain.

Last update:

April 2011 / First entry.

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Technical section

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

SEFIR, PS51534; SEFIR domain profile  (MATRIX)


Reference

1AuthorsNovatchkova M. Leibbrandt A. Werzowa J. Neubueser A. Eisenhaber F.
TitleThe STIR-domain superfamily in signal transduction, development and immunity.
SourceTrends Biochem. Sci. 28:226-229(2003).
PubMed ID12765832



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