NM_000089.4(COL1A2):c.1505G>A (p.Gly502Asp) AND multiple conditions

Germline classification:: Likely pathogenic (1 submission)
Last evaluated:: Aug 17, 2023
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV003802347.2

Allele description [Variation Report for NM_000089.4(COL1A2):c.1505G>A (p.Gly502Asp)]

NM_000089.4(COL1A2):c.1505G>A (p.Gly502Asp)

Gene:

COL1A2:collagen type I alpha 2 chain [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

7q21.3

Genomic location:

Preferred name:

NM_000089.4(COL1A2):c.1505G>A (p.Gly502Asp)

HGVS:

NC_000007.14:g.94413084G>A
NG_007405.1:g.23524G>A
NM_000089.4:c.1505G>AMANE SELECT
NP_000080.2:p.Gly502Asp
NP_000080.2:p.Gly502Asp
LRG_2t1:c.1505G>A
LRG_2:g.23524G>A
LRG_2p1:p.Gly502Asp
NC_000007.13:g.94042396G>A
NM_000089.3:c.1505G>A

Protein change:

G502D

Molecular consequence:

NM_000089.4:c.1505G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Osteogenesis imperfecta type I (OI1)
Synonyms:: OI, TYPE I; Osteogenesis imperfecta type 1; OI type 1; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0008146; MedGen: C0023931; Orphanet: 666; OMIM: 166200

Name:: Ehlers-Danlos syndrome, classic type, 1 (EDSCL1)
Synonyms:: EHLERS-DANLOS SYNDROME, GRAVIS TYPE; EHLERS-DANLOS SYNDROME, SEVERE CLASSIC TYPE; Ehlers-Danlos syndrome, type 1; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0019567; MedGen: C0268335; OMIM: 130000

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004608940	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Likely pathogenic (Aug 17, 2023)	germline	clinical testing	PubMed (6) [See all records that cite these PMIDs] 7695699, 8218237, 19344236, 9016532, 17078022, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004608940

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Likely pathogenic
(Aug 17, 2023)

germline

clinical testing

PubMed (6)
[See all records that cite these PMIDs]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Crystal and molecular structure of a collagen-like peptide at 1.9 A resolution.

Bella J, Eaton M, Brodsky B, Berman HM.

Science. 1994 Oct 7;266(5182):75-81.

PubMed [citation]

PMID:: 7695699

Characterization of collagen-like peptides containing interruptions in the repeating Gly-X-Y sequence.

Long CG, Braswell E, Zhu D, Apigo J, Baum J, Brodsky B.

Biochemistry. 1993 Nov 2;32(43):11688-95.

PubMed [citation]

PMID:: 8218237

See all PubMed Citations (6)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV004608940.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (6)

Description

This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 502 of the COL1A2 protein (p.Gly502Asp). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with COL1A2-related conditions. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant disrupts the triple helix domain of COL1A2. Glycine residues within the Gly-Xaa-Yaa repeats of the triple helix domain are required for the structure and stability of fibrillar collagens (PMID: 7695699, 8218237, 19344236). In COL1A2, variants affecting these glycine residues are significantly enriched in individuals with disease (PMID: 9016532, 17078022) compared to the general population (ExAC). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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