ClinVar Miner

Submissions for variant NM_006363.6(SEC23B):c.325G>A (p.Glu109Lys) (rs121918221)

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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
EGL Genetic Diagnostics,Eurofins Clinical Diagnostics RCV000081407 SCV000113338 pathogenic not provided 2013-11-18 criteria provided, single submitter clinical testing
Invitae RCV000688348 SCV000815954 pathogenic Congenital dyserythropoietic anemia, type II; Cowden syndrome 7 2018-08-14 criteria provided, single submitter clinical testing This sequence change replaces glutamic acid with lysine at codon 109 of the SEC23B protein (p.Glu109Lys). The glutamic acid residue is highly conserved and there is a small physicochemical difference between glutamic acid and lysine. This variant is present in population databases (rs121918221, ExAC 0.06%). This is the most common variant associated with congenital dyserythropoietic anemia type II, which many homozygous affected individuals reported (PMID: 19561605, 19621418, 20015893, 21252497, 21850656, 25044164). ClinVar contains an entry for this variant (Variation ID: 1222). Experimental studies have shown that this missense change destabilizes the protein in cell culture (PMID: 19561605). For these reasons, this variant has been classified as Pathogenic.
Illumina Clinical Services Laboratory,Illumina RCV000001281 SCV000915932 pathogenic Congenital dyserythropoietic anemia, type II 2018-10-05 criteria provided, single submitter clinical testing The SEC23B c.325G>A (p.Glu109Lys) variant has been reported in at least three studies and is found in a total of 25 individuals including 23 in a homozygous state and two in a compound heterozygous state with congenital dyserythropoietic anemia (Schwarz et al. 2009; Bianchi et al. 2009; Punzo et al. 2011; Amir et al. 2011). The p.Glu109Lys variant is described as a founder mutation among the Israeli Moroccan Jewish population (Amir et al. 2011). Control data are unavailable for this variant, which is reported at a frequency of 0.000577 in the African population of the Exome Aggregation Consortium. Expression analysis in HeLa-Kyoto cells determined the p.Glu109Lys variant had less than 5% of wildtype expression (Schwarz et al. 2009). Based on the evidence, the p.Glu109Lys variant is classified as pathogenic for congenital dyserythropoietic anemia. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population.
OMIM RCV000001281 SCV000021431 pathogenic Congenital dyserythropoietic anemia, type II 2009-09-01 no assertion criteria provided literature only

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