chr4-5562881-G-GGCATTCAAAAAGTTCTTCTTTTTC

Position:

• chr4-5562881-G-GGCATTCAAAAAGTTCTTCTTTTTC

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM4

The NM_147127.5(EVC2):​c.3893_3894insGAAAAAGAAGAACTTTTTGAATGC​(p.Lys1293_Lys1300dup) variant causes a inframe insertion change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: EVC2 NM_147127.5 inframe_insertion
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 5.03

Genes affected

EVC2 (HGNC:19747): (EvC ciliary complex subunit 2) This gene encodes a protein that functions in bone formation and skeletal development. Mutations in this gene, as well as in a neighboring gene that lies in a head-to-head configuration, cause Ellis-van Creveld syndrome, an autosomal recessive skeletal dysplasia that is also known as chondroectodermal dysplasia. Mutations in this gene also cause acrofacial dysostosis Weyers type, also referred to as Curry-Hall syndrome, a disease that combines limb and facial abnormalities. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_147127.5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EVC2	NM_147127.5	c.3893_3894insGAAAAAGAAGAACTTTTTGAATGC	p.Lys1293_Lys1300dup	inframe_insertion	22/22	ENST00000344408.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EVC2	ENST00000344408.10	c.3893_3894insGAAAAAGAAGAACTTTTTGAATGC	p.Lys1293_Lys1300dup	inframe_insertion	22/22	1	NM_147127.5	P2
EVC2	ENST00000310917.6	c.3653_3654insGAAAAAGAAGAACTTTTTGAATGC	p.Lys1213_Lys1220dup	inframe_insertion	22/22	1		A2
EVC2	ENST00000475313.5	c.3419+2376_3419+2377insGAAAAAGAAGAACTTTTTGAATGC		intron_variant, NMD_transcript_variant		1
EVC2	ENST00000509670.1	c.*2286_*2287insGAAAAAGAAGAACTTTTTGAATGC		3_prime_UTR_variant, NMD_transcript_variant	23/23	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Meckel-Gruber syndrome Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center

Dec 01, 2014

- -

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 08, 2024

Variant summary: EVC2 c.3870_3893dup24 (p.Lys1293_Lys1300dup) results in an in-frame duplication that is predicted to duplicate 8 amino acids into the encoded protein. The variant was absent in 251424 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.3870_3893dup24 has been reported in the literature in at least one homozygous individual affected with Meckel-Gruber syndrome (Shaheen_2013). These report(s) do not provide unequivocal conclusions about association of the variant with Ellis-van Creveld syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 29620724, 23169490, 34645488). ClinVar contains an entry for this variant (Variation ID: 183329). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs730882232; hg19: chr4-5564608;