chr5-36182027-T-A

Position:

• chr5-36182027-T-A

Variant summary

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

The NM_005983.4(SKP2):​c.1271T>A​(p.Leu424Gln) variant causes a missense 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SKP2 NM_005983.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.18

Genes affected

SKP2 (HGNC:10901): (S-phase kinase associated protein 2) This gene encodes a member of the F-box protein family which is characterized by an approximately 40 amino acid motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognizable motifs. The protein encoded by this gene belongs to the Fbls class; in addition to an F-box, this protein contains 10 tandem leucine-rich repeats. This protein is an essential element of the cyclin A-CDK2 S-phase kinase. It specifically recognizes phosphorylated cyclin-dependent kinase inhibitor 1B (CDKN1B, also referred to as p27 or KIP1) predominantly in S phase and interacts with S-phase kinase-associated protein 1 (SKP1 or p19). In addition, this gene is established as a protooncogene causally involved in the pathogenesis of lymphomas. Alternative splicing of this gene generates three transcript variants encoding different isoforms. [provided by RefSeq, Jul 2011]

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=0.067953795).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SKP2	NM_005983.4	c.1271T>A	p.Leu424Gln	missense_variant	10/10	ENST00000274255.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SKP2	ENST00000274255.11	c.1271T>A	p.Leu424Gln	missense_variant	10/10	1	NM_005983.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

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

Apr 12, 2023

The c.1271T>A (p.L424Q) alteration is located in exon 10 (coding exon 10) of the SKP2 gene. This alteration results from a T to A substitution at nucleotide position 1271, causing the leucine (L) at amino acid position 424 to be replaced by a glutamine (Q). 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	0.098
BayesDel_addAF	Benign	-0.084	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	.;T;T;.
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.13
FATHMM_MKL	Benign	0.19	N
LIST_S2	Benign	0.84	T;T;T;T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.068	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	.;L;.;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.65	.;N;.;N
REVEL	Benign	0.055
Sift	Uncertain	0.0030	.;D;.;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.43	.;B;.;.
Vest4		0.16
MutPred		0.32		.;Loss of catalytic residue at L424 (P = 0.0172);.;.;
MVP		0.17
MPC		1.3
ClinPred		0.71	D
GERP RS		3.3
Varity_R		0.16
gMVP		0.52

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-36182129;