2-73830915-A-G

Position:

• chr2-73830915-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_213622.4(STAMBP):​c.59A>G​(p.Gln20Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,738 control chromosomes in the GnomAD database, with no homozygous occurrence. 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)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: STAMBP NM_213622.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.31

Genes affected

STAMBP (HGNC:16950): (STAM binding protein) Cytokine-mediated signal transduction in the JAK-STAT cascade requires the involvement of adaptor molecules. One such signal-transducing adaptor molecule contains an SH3 domain that is required for induction of MYC and cell growth. The protein encoded by this gene binds to the SH3 domain of the signal-transducing adaptor molecule, and plays a critical role in cytokine-mediated signaling for MYC induction and cell cycle progression. Multiple alternatively spliced transcript variants encoding the same protein isoform have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a region_of_interest Interaction with CHMP3 (size 126) in uniprot entity STABP_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_213622.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11408377).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STAMBP	NM_213622.4	c.59A>G	p.Gln20Arg	missense_variant	2/10	ENST00000394070.7	NP_998787.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STAMBP	ENST00000394070.7	c.59A>G	p.Gln20Arg	missense_variant	2/10	1	NM_213622.4	ENSP00000377633	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461738 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727166

Gnomad4 AFR exome AF: 0.00

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 17, 2023

This sequence change replaces glutamine, which is neutral and polar, with arginine, which is basic and polar, at codon 20 of the STAMBP protein (p.Gln20Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with STAMBP-related conditions. ClinVar contains an entry for this variant (Variation ID: 1469518). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt STAMBP protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.41	T;T;.;.;T;.;T;.
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.12
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.73	.;T;T;T;.;T;.;T
M_CAP	Benign	0.0043	T
MetaRNN	Benign	0.11	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.3	L;L;.;.;L;.;L;.
MutationTaster	Benign	0.99	D;D;D;D;D
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.70	N;N;N;N;N;N;N;N
REVEL	Benign	0.057
Sift	Benign	0.17	T;T;T;T;T;T;T;T
Sift4G	Benign	0.29	T;T;T;T;T;T;T;T
Polyphen		0.0	B;B;.;.;B;.;B;.
Vest4		0.36
MutPred		0.19		Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);Gain of phosphorylation at S23 (P = 0.061);
MVP		0.49
MPC		0.32
ClinPred		0.27	T
GERP RS		3.6
Varity_R		0.12
gMVP		0.21

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1673830067; hg19: chr2-74058042;