{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T13:05:58Z","timestamp":1790514358635,"version":"4.1.0"},"reference-count":45,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2007,4,3]],"date-time":"2007-04-03T00:00:00Z","timestamp":1175558400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur J Immunol"],"published-print":{"date-parts":[[2007,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Deficiencies in terminal complement components, including the component C7, are uncommon and associated with an increased risk of recurrent systemic neisserial infection. A total of 22\u2004molecular defects have been reported in the C7 gene with both complete (C7Q0) and subtotal (C7SD) C7 deficiencies. In this study we report the molecular basis of nine new cases of C7 deficiencies that were characterized by exon\u2010specific sequence analysis. Seven different C7 gene mutations were identified corresponding to small deletions (<jats:italic>n<\/jats:italic>=2), splice site changes (<jats:italic>n<\/jats:italic>=1) and single base pair substitutions leading to nonsense (<jats:italic>n<\/jats:italic>=1) or missense (<jats:italic>n<\/jats:italic>=3) mutations. Altogether, three changes of the C7 gene (G357R, R499S and 5\u2032\u2004splice donor site of intron\u200416) account for half of the molecular defects which emphasize that a restricted number of molecular abnormalities are involved in this deficiency. We identified two patients with combined C7Q0\/C7SD(R499S) and established the C7SD(R499S) frequency at about 1% in normal Caucasian population. We demonstrated that C7(R499S) mutant protein is retained in the endoplasmic reticulum whereas the wild\u2010type C7 is located in the Golgi apparatus. Our results provide evidence that R499S represents a loss\u2010of\u2010function polymorphism of C7 due to a defective folding of the protein.<\/jats:p>","DOI":"10.1002\/eji.200636812","type":"journal-article","created":{"date-parts":[[2007,4,3]],"date-time":"2007-04-03T13:25:20Z","timestamp":1175606720000},"page":"1377-1385","source":"Crossref","is-referenced-by-count":30,"title":["Hereditary complement C7 deficiency in nine families: Subtotal C7 deficiency revisited"],"prefix":"10.1002","volume":"37","author":[{"given":"Marie\u2010Anne","family":"Rameix\u2010Welti","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Catherine\u2004H.","family":"R\u00e9gnier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Bienaim\u00e9","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacques","family":"Blouin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jurg","family":"Schifferli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wolf\u2004H.","family":"Fridman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Catherine","family":"Saut\u00e8s\u2010Fridman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Veronique","family":"Fr\u00e9meaux\u2010Bacchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2007,4,19]]},"reference":[{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM200104053441406"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1042\/bj2640001"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/eji.1830220515"},{"key":"e_1_2_7_4_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2249.2000.01263.x"},{"key":"e_1_2_7_5_2","doi-asserted-by":"crossref","first-page":"5188","DOI":"10.4049\/jimmunol.154.10.5188","article-title":"Structure of the human C7 gene and comparison with the C6, C8A, C8B, and C9 genes.","volume":"154","author":"Hobart M. 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