NM_000089.4:c.1383C>T

Variant names:

• chr7-94412100-C-T
• rs139726213
• NM_000089.4:c.1383C>T

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS1

The NM_000089.4(COL1A2):​c.1383C>T​(p.Pro461Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000332 in 1,612,824 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P461P) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0011 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00025 (1 hom.)
• Consequence: COL1A2 NM_000089.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11
• Conservation: PhyloP100: 0.578
• Publications: 5 publications found

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]

COL1A2 Gene-Disease associations (from GenCC):

• COL1A2-related Ehlers-Danlos syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• COL1A2-related osteogenesis imperfecta

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Ehlers-Danlos syndrome, arthrochalasia type, 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Illumina, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• osteogenesis imperfecta

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• osteogenesis imperfecta type 1

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• osteogenesis imperfecta type 2

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet, G2P
• osteogenesis imperfecta type 3

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
• osteogenesis imperfecta type 4

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• Ehlers-Danlos syndrome, arthrochalasia type

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, ClinGen
• Ehlers-Danlos syndrome, cardiac valvular type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, G2P, ClinGen
• combined osteogenesis imperfecta and Ehlers-Danlos syndrome 2

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics, ClinGen
• Ehlers-Danlos/osteogenesis imperfecta syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• high bone mass osteogenesis imperfecta

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• congenital heart disease

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.59).
• BP6: Variant 7-94412100-C-T is Benign according to our data. Variant chr7-94412100-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 35936.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.578 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00112 (170/152170) while in subpopulation AFR AF = 0.00366 (152/41514). AF 95% confidence interval is 0.00319. There are 0 homozygotes in GnomAd4. There are 74 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000089.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL1A2	NM_000089.4	MANE Select	c.1383C>T	p.Pro461Pro	synonymous	Exon 24 of 52	NP_000080.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL1A2	ENST00000297268.11	TSL:1 MANE Select	c.1383C>T	p.Pro461Pro	synonymous	Exon 24 of 52	ENSP00000297268.6	P08123
	COL1A2	ENST00000959377.1		c.1383C>T	p.Pro461Pro	synonymous	Exon 24 of 52	ENSP00000629436.1
	COL1A2	ENST00000959379.1		c.1383C>T	p.Pro461Pro	synonymous	Exon 24 of 52	ENSP00000629438.1

Frequencies

GnomAD3 genomes AF: 0.00114 AC: 173 AN: 152052 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00374

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000328

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000509 AC: 127 AN: 249634 AF XY: 0.000415

Gnomad AFR exome AF: 0.00416

Gnomad AMR exome AF: 0.000377

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000109

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000160

Gnomad OTH exome AF: 0.000655

GnomAD4 exome AF: 0.000250 AC: 365 AN: 1460654 Hom.: 1 Cov.: 30 AF XY: 0.000240 AC XY: 174 AN XY: 726506

African (AFR) AF: 0.00302 AC: 101 AN: 33472

American (AMR) AF: 0.000403 AC: 18 AN: 44672

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26082

East Asian (EAS) AF: 0.0000504 AC: 2 AN: 39682

South Asian (SAS) AF: 0.000605 AC: 52 AN: 85968

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53374

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5768

European-Non Finnish (NFE) AF: 0.000154 AC: 171 AN: 1111276

Other (OTH) AF: 0.000315 AC: 19 AN: 60360

GnomAD4 genome AF: 0.00112 AC: 170 AN: 152170 Hom.: 0 Cov.: 32 AF XY: 0.000994 AC XY: 74 AN XY: 74414

African (AFR) AF: 0.00366 AC: 152 AN: 41514

American (AMR) AF: 0.000327 AC: 5 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.000208 AC: 1 AN: 4812

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10598

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000176 AC: 12 AN: 68000

Other (OTH) AF: 0.00 AC: 0 AN: 2108

Alfa AF: 0.000524 Hom.: 1

Bravo AF: 0.00121

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.000218

EpiControl AF: 0.000238

ClinVar

ClinVar submissions

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not provided (2)
-	-	2	not specified (2)
-	-	2	Osteogenesis imperfecta (2)
-	-	1	Cardiovascular phenotype (1)
-	-	1	COL1A2-related disorder (1)
-	-	1	Ehlers-Danlos syndrome, arthrochalasia type, 2 (1)
-	-	1	Osteogenesis imperfecta type I;C0268335:Ehlers-Danlos syndrome, classic type, 1 (1)
-	-	1	Osteoporosis;C0268358:Osteogenesis imperfecta, perinatal lethal;C0268362:Osteogenesis imperfecta type III;C0268363:Osteogenesis imperfecta with normal sclerae, dominant form;C4303789:Ehlers-Danlos syndrome, cardiac valvular type;C5436847:Combined osteogenesis imperfecta and Ehlers-Danlos syndrome 2;CN293783:Ehlers-Danlos syndrome, arthrochalasia type, 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.59
CADD	Benign	8.8
DANN	Benign	0.49
PhyloP100		0.58
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs139726213; hg19: chr7-94041412;