2-148875741-G-C

Variant names:

• chr2-148875741-G-C
• rs1681163044
• NM_004522.3:c.124G>C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004522.3(KIF5C):​c.124G>C​(p.Gly42Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000207 in 1,451,506 control chromosomes in the GnomAD database, with no homozygous occurrence. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: KIF5C NM_004522.3 missense, splice_region
• Scores: Splicing: ADA: 0.001362
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.16

Genes affected

KIF5C (HGNC:6325): (kinesin family member 5C) The protein encoded by this gene is a kinesin heavy chain subunit involved in the transport of cargo within the central nervous system. The encoded protein, which acts as a tetramer by associating with another heavy chain and two light chains, interacts with protein kinase CK2. Mutations in this gene have been associated with complex cortical dysplasia with other brain malformations-2. Two transcript variants, one protein-coding and the other non-protein coding, have been found for this gene. [provided by RefSeq, Jul 2015]

KIF5C-AS1 (HGNC:40325): (KIF5C antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF5C	NM_004522.3	c.124G>C	p.Gly42Arg	missense_variant, splice_region_variant	Exon 1 of 26	ENST00000435030.6	NP_004513.1
KIF5C	XM_017004062.2	c.124G>C	p.Gly42Arg	missense_variant, splice_region_variant	Exon 1 of 26		XP_016859551.1
KIF5C-AS1	XR_001739733.2	n.7577C>G		non_coding_transcript_exon_variant	Exon 4 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF5C	ENST00000435030.6	c.124G>C	p.Gly42Arg	missense_variant, splice_region_variant	Exon 1 of 26	1	NM_004522.3	ENSP00000393379.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000207 AC: 3 AN: 1451506 Hom.: 0 Cov.: 34 AF XY: 0.00000277 AC XY: 2 AN XY: 720988

Gnomad4 AFR exome AF: 0.0000602

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.03e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Jul 26, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.124G>C (p.G42R) alteration is located in exon 1 (coding exon 1) of the KIF5C gene. This alteration results from a G to C substitution at nucleotide position 124, causing the glycine (G) at amino acid position 42 to be replaced by an arginine (R). 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	Pathogenic	0.60
BayesDel_addAF	Benign	-0.021	T
BayesDel_noAF	Benign	-0.27
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.64	D
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.83	T
M_CAP	Pathogenic	0.88	D
MetaRNN	Uncertain	0.56	D
MetaSVM	Benign	-0.56	T
PrimateAI	Pathogenic	0.83	D
PROVEAN	Uncertain	-2.6	D
REVEL	Uncertain	0.34
Sift	Benign	0.030	D
Sift4G	Benign	0.061	T
Polyphen		0.20	B
Vest4		0.36
MutPred		0.45		Loss of ubiquitination at K45 (P = 0.0863);
MVP		0.72
MPC		1.2
ClinPred		0.80	D
GERP RS		3.4
Varity_R		0.29
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0014
dbscSNV1_RF	Benign	0.052
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: rs1681163044; hg19: chr2-149633310;