GM20240

GM20240 LCL from B-Lymphocyte

Description:

FRAGILE X MENTAL RETARDATION SYNDROME
FMR1 GENE; FMR1

Affected:

No

Sex:

Female

Age:

38 YR (At Sampling)

Overview

Repository

NIGMS Human Genetic Cell Repository

Subcollection

Heritable Diseases
GeT-RM Samples

Class

Disorders with Trinucleotide Expansions

Biopsy Source

Peripheral vein

Cell Type

B-Lymphocyte

Tissue Type

Blood

Transformant

Epstein-Barr Virus

Sample Source

LCL from B-Lymphocyte

Race

White

Relation to Proband

proband

Confirmation

Molecular characterization before cell line submission to CCR

Species

Homo sapiens

Common Name

Human

Remarks

Clinically unaffected; donor subject has CGG repeat sizes of 30 in allele 1 and 80 in allele 2 in the 5 prime untranslated region (UTR) of the FMR1 gene; CGG repeat size was determined by testing in 9 independent laboratories using two methods each; heterozygous for a mutation in the hemochromatosis gene, HFE, leading to a histidine to aspartic acid substitution at codon position 63 [HIS63ASP (H63D)]; Prader-Willi/Angelman Syndrome negative.

Characterizations

IDENTIFICATION OF SPECIES OF ORIGIN

Species of Origin confirmed by LINE assay

Gene

FMR1

Chromosomal Location

Xq27.3

Allelic Variant 1

309550.0004; FRAGILE X MENTAL RETARDATION SYNDROME

Identified Mutation

(CGG)n EXPANSION; The usual cause of the fragile X syndrome is an expanded (CGG)n repeat in the 5-prime noncoding region of the FMR1 gene.

Gene

HFE

Chromosomal Location

6p22.2

Allelic Variant 1

613609.0002; HEMOCHROMATOSIS

Identified Mutation

c.187C>G (p.HIS63ASP); A mutation caused by a C-to-G transversion in exon 2 results in a histidine to aspartic acid substitution at codon position 63 [his63asp (H63D)] in the HFE gene.

Phenotypic Data

Remarks

Publications

Caballero M, Ge T, Rebelo AR, Seo S, Kim S, Brooks K, Zuccaro M, Kanagaraj R, Vershkov D, Kim D, Smogorzewska A, Smolka M, Benvenisty N, West SC, Egli D, Mace EM, Koren A, Comprehensive analysis of DNA replication timing across 184 cell lines suggests a role for MCM10 in replication timing regulation Human molecular genetics: 2021

PubMed ID: 35394024

Rafehi H, Szmulewicz DJ, Bennett MF, Sobreira NLM, Pope K, Smith KR, Gillies G, Diakumis P, Dolzhenko E, Eberle MA, Barcina MG, Breen DP, Chancellor AM, Cremer PD, Delatycki MB, Fogel BL, Hackett A, Halmagyi GM, Kapetanovic S, Lang A, Mossman S, Mu W, Patrikios P, Perlman SL, Rosemergy I, Storey E, Watson SRD, Wilson MA, Zee DS, Valle D, Amor DJ, Bahlo M, Lockhart PJ, Bioinformatics-Based Identification of Expanded Repeats: A Non-reference Intronic Pentamer Expansion in RFC1 Causes CANVAS American journal of human genetics105:151-165 2019

PubMed ID: 31230722

Tankard RM, Bennett MF, Degorski P, Delatycki MB, Lockhart PJ, Bahlo M, Detecting Expansions of Tandem Repeats in Cohorts Sequenced with Short-Read Sequencing Data American journal of human genetics105:151-165 2017

PubMed ID: 30503517

Amos Wilson J, Pratt VM, Phansalkar A, Muralidharan K, Highsmith WE, Beck JC, Bridgeman S, Courtney EM, Epp L, Ferreira-Gonzalez A, Hjelm NL, Holtegaard LM, Jama MA, Jakupciak JP, Johnson MA, Labrousse P, Lyon E, Prior TW, Richards CS, Richie KL, Roa BB, Rohlfs EM, Sellers T, Sherman SL, Siegrist KA, Silverman LM, Wiszniewska J, Kalman LV, the Fragile Xperts Working Group of the Association for Molecular Pathology Clinical Practice Committee LV, Consensus Characterization of 16 FMR1 Reference Materials: A Consortium Study Journal of Molecular Diagnostics10:2-12 2007

PubMed ID: 18165276