Disease:A genetic variation in transmembrane domain of IL7R is associated with susceptibility to multiple sclerosis (MS) [MIM:126200]. Overtransmission of the major 'C' allele coding for Thr-244 are detected in offspring affected with multiple sclerosis. In vitro analysis of transcripts from minigenes containing either 'C' allele (Thr-244) or 'T' allele (Ile-244) shows that the 'C' allele results in an approximately two-fold increase in the skipping of exon 6 , leading to increased production of a soluble form of IL7R. Thus , the multiple sclerosis associated 'C' risk allele of IL7R would probably decrease membrane-bound expression of IL7R. As this risk allele is common in the general population , some additional triggers are probably required for the development and progression of MS. ,Disease:Defects in IL7R are a cause of autosomal recessive severe combined immunodeficiency T-cell-negative/B-cell-positive/NK cell-positive (T (-) /B (+) /NK (+) SCID) [MIM:608971]. SCID refers to a genetically and clinically group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity , leukopenia , and low or absent antibody levels. Patients with SCID present in infancy with recurrent , persistent infections by opportunistic organisms , including Candida albicans , Pneumocystis carinii , and cytomegalovirus , among many others. The common characteristic of all types of SCID is absence of T-cell-mediated cellular immunity due to a defect in T-cell development. ,Domain:The box 1 motif is required for JAK interaction and/or activation. ,Domain:The WSXWS motif appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding. ,Function:Receptor for interleukin-7. Also acts as a receptor for thymic stromal lymphopoietin (TSLP) . ,online information:IL7R mutation db ,sequence Caution:Contaminating sequence. Potential poly-A sequence. ,similarity:Belongs to the type I cytokine receptor family. Type 4 subfamily. ,similarity:Contains 1 fibronectin type-III domain. ,subunit:The IL7 receptor is an heterodimer of IL7R and IL2RG. The TSLP receptor is an heterodimer of CRLF2 and IL7R. ,
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