3-124667095-T-A

Variant names:

• chr3-124667095-T-A
• NM_001388419.1:c.6615T>A
• KALRN p.Val2205Val

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_001388419.1(KALRN):​c.6615T>A​(p.Val2205Val) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. V2205V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KALRN NM_001388419.1 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0870
• Publications: 0 publications found

Genes affected

KALRN (HGNC:4814): (kalirin RhoGEF kinase) Huntington's disease (HD), a neurodegenerative disorder characterized by loss of striatal neurons, is caused by an expansion of a polyglutamine tract in the HD protein huntingtin. This gene encodes a protein that interacts with the huntingtin-associated protein 1, which is a huntingtin binding protein that may function in vesicle trafficking. [provided by RefSeq, Apr 2016]

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.43).
• BP7: Synonymous conserved (PhyloP=-0.087 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001388419.1. 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
	KALRN	NM_001388419.1	MANE Select	c.6615T>A	p.Val2205Val	synonymous	Exon 47 of 60	NP_001375348.1	O60229-7
	KALRN	NM_001024660.5		c.6612T>A	p.Val2204Val	synonymous	Exon 47 of 60	NP_001019831.2	O60229-1
	KALRN	NM_001322988.2		c.6609T>A	p.Val2203Val	synonymous	Exon 47 of 49	NP_001309917.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KALRN	ENST00000682506.1	MANE Select	c.6615T>A	p.Val2205Val	synonymous	Exon 47 of 60	ENSP00000508359.1	O60229-7
	KALRN	ENST00000291478.9	TSL:1	c.1521T>A	p.Val507Val	synonymous	Exon 14 of 27	ENSP00000291478.4	O60229-4
	KALRN	ENST00000360013.7	TSL:5	c.6612T>A	p.Val2204Val	synonymous	Exon 47 of 60	ENSP00000353109.3	O60229-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.43
CADD	Benign	5.8
DANN	Benign	0.77
PhyloP100		-0.087

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr3-124385942;