3-124674566-C-T

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 1P and 8B. PP2 BP4_Strong BS2

The NM_001388419.1(KALRN):c.7145C>T(p.Ala2382Val) variant causes a missense change. The variant allele was found at a frequency of 0.0000603 in 1,608,162 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000072 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000059 (0 hom.)
• Consequence: KALRN NM_001388419.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.17

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

Verdict is Benign. Variant got -7 ACMG points.

• PP2: Missense variant where missense usually causes diseases, KALRN
• BP4: Computational evidence support a benign effect (MetaRNN=0.04628411).
• BS2: High AC in GnomAd at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KALRN	NM_001388419.1	c.7145C>T	p.Ala2382Val	missense_variant	49/60	ENST00000682506.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KALRN	ENST00000682506.1	c.7145C>T	p.Ala2382Val	missense_variant	49/60		NM_001388419.1	A2

Frequencies

GnomAD3 genomes AF: 0.0000723 AC: 11 AN: 152164 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000131 AC: 32 AN: 243710 Hom.: 0 AF XY: 0.000114 AC XY: 15 AN XY: 131808

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000305

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00172

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000591 AC: 86 AN: 1455880 Hom.: 0 Cov.: 31 AF XY: 0.0000594 AC XY: 43 AN XY: 723742

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000227

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00172

Gnomad4 SAS exome AF: 0.0000235

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000117

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.0000722 AC: 11 AN: 152282 Hom.: 0 Cov.: 31 AF XY: 0.0000940 AC XY: 7 AN XY: 74478

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000907

ExAC AF: 0.0000906 AC: 11

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.33
BayesDel_addAF	Benign	-0.42	T
BayesDel_noAF	Benign	-0.39
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.022	T;.
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Benign	0.0063	T
MetaRNN	Benign	0.046	T;T
MetaSVM	Benign	-0.82	T
MutationTaster	Benign	0.69	D;D;N;N;N
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-1.9	N;D
REVEL	Benign	0.080
Sift	Benign	0.071	T;D
Sift4G	Uncertain	0.024	D;D
Vest4		0.58
MVP		0.62
ClinPred		0.10	T
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs143716563; hg19: chr3-124393413; COSMIC: COSV52255531; COSMIC: COSV52255531;