chr12-26999673-G-A

Position:

• chr12-26999673-G-A

Variant summary

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

The NM_016551.3(TM7SF3):​c.250C>T​(p.Leu84Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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. L84V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: TM7SF3 NM_016551.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.810

Genes affected

TM7SF3 (HGNC:23049): (transmembrane 7 superfamily member 3) Involved in cellular response to unfolded protein; negative regulation of programmed cell death; and positive regulation of insulin secretion. Located in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

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=0.05798325).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TM7SF3	NM_016551.3	c.250C>T	p.Leu84Phe	missense_variant	3/12	ENST00000343028.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TM7SF3	ENST00000343028.9	c.250C>T	p.Leu84Phe	missense_variant	3/12	1	NM_016551.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461812 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727208

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

EpiCase AF: 0.00

EpiControl AF: 0.0000593

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

Jul 16, 2021

The c.250C>T (p.L84F) alteration is located in exon 3 (coding exon 3) of the TM7SF3 gene. This alteration results from a C to T substitution at nucleotide position 250, causing the leucine (L) at amino acid position 84 to be replaced by a phenylalanine (F). 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	0.076
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	12
DANN	Benign	0.97
DEOGEN2	Benign	0.0053	T;.;T
Eigen	Benign	-0.75
Eigen_PC	Benign	-0.69
FATHMM_MKL	Benign	0.091	N
LIST_S2	Benign	0.60	T;T;T
M_CAP	Benign	0.0039	T
MetaRNN	Benign	0.058	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L;.;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.26	T
PROVEAN	Benign	0.18	N;N;N
REVEL	Benign	0.088
Sift	Benign	0.75	T;T;T
Sift4G	Benign	0.71	T;.;.
Polyphen		0.0010	B;.;.
Vest4		0.17
MutPred		0.34		Gain of catalytic residue at F80 (P = 0.0028);.;.;
MVP		0.067
MPC		0.16
ClinPred		0.12	T
GERP RS		0.22
Varity_R		0.038
gMVP		0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: chr12-27152606;