chr9-70282519-T-C

Position:

• chr9-70282519-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015110.4(SMC5):​c.917T>C​(p.Val306Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V306I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMC5 NM_015110.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.78

Genes affected

SMC5 (HGNC:20465): (structural maintenance of chromosomes 5) Predicted to enable ATP binding activity. Involved in several processes, including DNA recombination; cellular senescence; and positive regulation of maintenance of mitotic sister chromatid cohesion. Located in cell junction; chromosome; and nuclear body. Part of Smc5-Smc6 complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.093877494).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMC5	NM_015110.4	c.917T>C	p.Val306Ala	missense_variant	7/25	ENST00000361138.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMC5	ENST00000361138.7	c.917T>C	p.Val306Ala	missense_variant	7/25	1	NM_015110.4	P1
SMC5	ENST00000618375.1	n.48T>C		non_coding_transcript_exon_variant	1/3	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 13, 2024

The c.917T>C (p.V306A) alteration is located in exon 7 (coding exon 7) of the SMC5 gene. This alteration results from a T to C substitution at nucleotide position 917, causing the valine (V) at amino acid position 306 to be replaced by an alanine (A). 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	0.23
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.63
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.049	T
Eigen	Benign	-0.55
Eigen_PC	Benign	-0.38
FATHMM_MKL	Benign	0.47	N
LIST_S2	Benign	0.25	T
M_CAP	Benign	0.0058	T
MetaRNN	Benign	0.094	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-1.5	N
REVEL	Benign	0.086
Sift	Uncertain	0.018	D
Sift4G	Benign	0.18	T
Polyphen		0.030	B
Vest4		0.10
MutPred		0.37		Gain of relative solvent accessibility (P = 0.0483);
MVP		0.10
MPC		0.20
ClinPred		0.36	T
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.11
gMVP		0.32

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: chr9-72897435;