19-45350988-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_177417.3(KLC3):c.1414G>A(p.Val472Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000123 in 1,614,120 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000066 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00013 (0 hom.)
• Consequence: KLC3 NM_177417.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.583

Genes affected

KLC3 (HGNC:20717): (kinesin light chain 3) This gene encodes a member of the kinesin light chain gene family. Kinesins are molecular motors involved in the transport of cargo along microtubules, and are composed of two kinesin heavy chain (KHC) and two kinesin light chain (KLC) molecules. KLCs are thought to typically be involved in binding cargo and regulating kinesin activity. In the rat, a protein similar to this gene product is expressed in post-meiotic spermatids, where it associates with structural components of sperm tails and mitochondria. [provided by RefSeq, Jul 2008]

ERCC2 (HGNC:3434): (ERCC excision repair 2, TFIIH core complex helicase subunit) The nucleotide excision repair pathway is a mechanism to repair damage to DNA. The protein encoded by this gene is involved in transcription-coupled nucleotide excision repair and is an integral member of the basal transcription factor BTF2/TFIIH complex. The gene product has ATP-dependent DNA helicase activity and belongs to the RAD3/XPD subfamily of helicases. Defects in this gene can result in three different disorders, the cancer-prone syndrome xeroderma pigmentosum complementation group D, trichothiodystrophy, and Cockayne syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.040437102).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KLC3	NM_177417.3	c.1414G>A	p.Val472Met	missense_variant	12/13	ENST00000391946.7
ERCC2	NM_000400.4	c.*641C>T		3_prime_UTR_variant	23/23	ENST00000391945.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KLC3	ENST00000391946.7	c.1414G>A	p.Val472Met	missense_variant	12/13	1	NM_177417.3	P4
ERCC2	ENST00000391945.10	c.*641C>T		3_prime_UTR_variant	23/23	1	NM_000400.4	P1

Frequencies

GnomAD3 genomes AF: 0.0000657 AC: 10 AN: 152118 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000921 AC: 23 AN: 249676 Hom.: 0 AF XY: 0.000111 AC XY: 15 AN XY: 135458

Gnomad AFR exome AF: 0.0000645

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000129 AC: 188 AN: 1461884 Hom.: 0 Cov.: 33 AF XY: 0.000124 AC XY: 90 AN XY: 727248

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.000157

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000696

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000147

Gnomad4 OTH exome AF: 0.000149

GnomAD4 genome AF: 0.0000657 AC: 10 AN: 152236 Hom.: 0 Cov.: 31 AF XY: 0.000107 AC XY: 8 AN XY: 74428

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000103

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000115 Hom.: 0

Bravo AF: 0.0000642

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000355 AC: 3

ExAC AF: 0.000116 AC: 14

EpiCase AF: 0.00

EpiControl AF: 0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 16, 2024

The c.1414G>A (p.V472M) alteration is located in exon 12 (coding exon 11) of the KLC3 gene. This alteration results from a G to A substitution at nucleotide position 1414, causing the valine (V) at amino acid position 472 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.50
Cadd	Benign	0.0040
Dann	Benign	0.54
DEOGEN2	Benign	0.058	T;.;.
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.016	N
LIST_S2	Benign	0.59	T;T;T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.040	T;T;T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	-0.13	N;.;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.46	N;.;N
REVEL	Benign	0.14
Sift	Benign	0.12	T;.;T
Sift4G	Benign	0.12	T;T;T
Polyphen		0.015	B;B;B
Vest4		0.11
MVP		0.27
MPC		0.013
ClinPred		0.035	T
GERP RS		-7.4
Varity_R		0.018
gMVP		0.31

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: rs371326680; hg19: chr19-45854246; COSMIC: COSV67270058; COSMIC: COSV67270058;