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Critical Reviews™ in Immunology
Импакт фактор: 1.352 5-летний Импакт фактор: 3.347 SJR: 1.022 SNIP: 0.55 CiteScore™: 2.19

ISSN Печать: 1040-8401
ISSN Онлайн: 2162-6472

Выпуски:
Том 39, 2019 Том 38, 2018 Том 37, 2017 Том 36, 2016 Том 35, 2015 Том 34, 2014 Том 33, 2013 Том 32, 2012 Том 31, 2011 Том 30, 2010 Том 29, 2009 Том 28, 2008 Том 27, 2007 Том 26, 2006 Том 25, 2005 Том 24, 2004 Том 23, 2003 Том 22, 2002 Том 21, 2001 Том 20, 2000 Том 19, 1999 Том 18, 1998 Том 17, 1997 Том 16, 1996 Том 15, 1995 Том 14, 1994

Critical Reviews™ in Immunology

DOI: 10.1615/CritRevImmunol.v24.i1.10
38 pages

The Scavenger Receptor Cysteine-Rich (SRCR) Domain: An Ancient and Highly Conserved Protein Module of the Innate Immune System

Maria Rosa Sarrias
Sevei d’Immunologia, Institut Clinic d’Infeccions i Immunologia (ICII), Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Hospital Clinic, Barcelona, Spain
Jorn Gronlund
Immunology and Microbiology, Institute of Medical Biology, University of Southern Denmark, Odense, Denmark
Olga Padilla
Servei d’Immunologia, Institut Clinic d’Infeccions i Immunologia (ICII), Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Hospital Clinic, Barcelona, Spain
Jens Madsen
Immunology and Microbiology, Institute of Medical Biology, University of Southern Denmark, Odense, Denmark
Uffe Holmskov
Immunology and Microbiology, Institute of Medical Biology, University of Southern Denmark, Odense, Denmark
Francisco Lozano
Group of Immune Receptors of the Innate and Adaptive System, IDIBAPS; Departament de Biologia Cellular, Immunologia i Neurociencies, Facultat de Medicina, Universitat de Barcelona; Servei d'Immunologia, Hospital Clinic de Barcelona, Barcelona, Spain

Краткое описание

The Scavenger Receptor Cysteine-Rich (SRCR) domain is an ancient and highly conserved protein module of ~100−110 amino acids, which defines a superfamily (SRCR-SF) of either soluble or membrane-bound receptors expressed by hematopoietic and nonhematopoietic cells, at either embryonic or adult stages. The existence of two types of SRCR domains allows the division of the SRCR-SF into two groups. Members of group A contain SRCR domains with 6 cysteine residues and are encoded by two exons, whereas those of group B usually contain 8 cysteines and are encoded by a single exon. Group A members usually present as multidomain mosaic proteins containing single SRCR domains associated to other functional domains, such as enzymatic (protease) domains or collagenous regions. On the contrary, group B members generally present as proteins exclusively composed of tandem repeats of SRCR domains, with or without the presence of CUB and ZP domains thought to be involved in oligomerization but never associated to protease domains. Representatives of either group are found in different animal species, from low invertebrates (sponges) to high vertebrates (mammals). Although no unifying function has been defined for SRCR-SF members, accumulated data, together with the high degree of structural and phylogenetic conservation of SRCR domains indicates that they might subserve basic homeostatic functions, including innate immune defense.


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