rs775850964

Variant names:

• chr7-94429311-A-C
• rs775850964
• NM_000089.4:c.3835A>C

Your query was ambiguous. Multiple possible variants found:

• chr7-94429311-A-C
• chr7-94429311-A-G
• chr7-94429311-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_000089.4(COL1A2):​c.3835A>C​(p.Met1279Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 31)
• Consequence: COL1A2 NM_000089.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.655

Genes affected

COL1A2 (HGNC:2198): (collagen type I alpha 2 chain) This gene encodes the pro-alpha2 chain of type I collagen whose triple helix comprises two alpha1 chains and one alpha2 chain. Type I is a fibril-forming collagen found in most connective tissues and is abundant in bone, cornea, dermis and tendon. Mutations in this gene are associated with osteogenesis imperfecta types I-IV, Ehlers-Danlos syndrome type VIIB, recessive Ehlers-Danlos syndrome Classical type, idiopathic osteoporosis, and atypical Marfan syndrome. Symptoms associated with mutations in this gene, however, tend to be less severe than mutations in the gene for the alpha1 chain of type I collagen (COL1A1) reflecting the different role of alpha2 chains in matrix integrity. Three transcripts, resulting from the use of alternate polyadenylation signals, have been identified for this gene. [provided by R. Dalgleish, Feb 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the COL1A2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 437 curated pathogenic missense variants (we use a threshold of 10). The gene has 17 curated benign missense variants. Gene score misZ: 2.1491 (below the threshold of 3.09). Trascript score misZ: 3.5344 (above the threshold of 3.09). GenCC associations: The gene is linked to Ehlers-Danlos/osteogenesis imperfecta syndrome, Ehlers-Danlos syndrome, cardiac valvular type, ehlers-danlos syndrome, arthrochalasia type, 2, Ehlers-Danlos syndrome, arthrochalasia type, osteogenesis imperfecta type 3, high bone mass osteogenesis imperfecta, combined osteogenesis imperfecta and Ehlers-Danlos syndrome 2, osteogenesis imperfecta type 4, osteogenesis imperfecta type 2, osteogenesis imperfecta type 1.
• BP4: Computational evidence support a benign effect (MetaRNN=0.26260912).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL1A2	NM_000089.4	c.3835A>C	p.Met1279Leu	missense_variant	Exon 51 of 52	ENST00000297268.11	NP_000080.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL1A2	ENST00000297268.11	c.3835A>C	p.Met1279Leu	missense_variant	Exon 51 of 52	1	NM_000089.4	ENSP00000297268.6
COL1A2	ENST00000464916.1	n.883A>C		non_coding_transcript_exon_variant	Exon 3 of 4	2
COL1A2	ENST00000481570.5	n.4616A>C		non_coding_transcript_exon_variant	Exon 8 of 8	2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.091	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	14
DANN	Benign	0.69
DEOGEN2	Benign	0.24	T;.
Eigen	Benign	-0.75
Eigen_PC	Benign	-0.64
FATHMM_MKL	Benign	0.76	D
LIST_S2	Benign	0.80	T;T
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.26	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.98	L;.
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-1.8	N;.
REVEL	Benign	0.14
Sift	Benign	0.13	T;.
Sift4G	Benign	0.30	T;T
Polyphen		0.0	B;.
Vest4		0.19
MutPred		0.69		Loss of phosphorylation at Y1278 (P = 0.1104);.;
MVP		0.29
MPC		0.20
ClinPred		0.23	T
GERP RS		-2.9
Varity_R		0.33
gMVP		0.42

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs775850964; hg19: chr7-94058623;