16-69187387-C-T

Position:

chr16-69187387-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006750.4(SNTB2):c.221C>T(p.Pro74Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000107 in 1,305,964 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000067 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

SNTB2
NM_006750.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.83

Variant links:

Genes affected

SNTB2 (HGNC:11169): (syntrophin beta 2) Dystrophin is a large, rod-like cytoskeletal protein found at the inner surface of muscle fibers. Dystrophin is missing in Duchenne Muscular Dystrophy patients and is present in reduced amounts in Becker Muscular Dystrophy patients. The protein encoded by this gene is a peripheral membrane protein found associated with dystrophin and dystrophin-related proteins. This gene is a member of the syntrophin gene family, which contains at least two other structurally-related genes. [provided by RefSeq, Jul 2008]

SNTB2 links:

UTP4 (HGNC:1983): (UTP4 small subunit processome component) This gene encodes a WD40-repeat-containing protein that is localized to the nucleolus. Mutation of this gene causes North American Indian childhood cirrhosis, a severe intrahepatic cholestasis that results in transient neonatal jaundice, and progresses to periportal fibrosis and cirrhosis in childhood and adolescence. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

UTP4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.17360568).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SNTB2	NM_006750.4 linkuse as main transcript	c.221C>T	p.Pro74Leu	missense_variant	1/7	ENST00000336278.9
SNTB2	NR_172088.1 linkuse as main transcript	n.224C>T		non_coding_transcript_exon_variant	1/8
SNTB2	NR_172089.1 linkuse as main transcript	n.224C>T		non_coding_transcript_exon_variant	1/7
SNTB2	NR_172090.1 linkuse as main transcript	n.224C>T		non_coding_transcript_exon_variant	1/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SNTB2	ENST00000336278.9 linkuse as main transcript	c.221C>T	p.Pro74Leu	missense_variant	1/7	1	NM_006750.4	P1	Q13425-1
SNTB2	ENST00000467311.5 linkuse as main transcript	c.221C>T	p.Pro74Leu	missense_variant, NMD_transcript_variant	1/6	1			Q13425-2
UTP4	ENST00000567287.2 linkuse as main transcript	n.82+20202C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00000667

AC:

AN:

149960

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000149

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000112

AC:

AN:

1156004

Hom.:

Cov.:

AF XY:

0.00000356

AC XY:

AN XY:

561996

show subpopulations

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:

0.00000933

Gnomad4 OTH exome

AF:

0.0000870

GnomAD4 genome

AF:

0.00000667

AC:

AN:

149960

Hom.:

Cov.:

AF XY:

0.0000137

AC XY:

AN XY:

73158

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000149

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.221C>T (p.P74L) alteration is located in exon 1 (coding exon 1) of the SNTB2 gene. This alteration results from a C to T substitution at nucleotide position 221, causing the proline (P) at amino acid position 74 to be replaced by a leucine (L). 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

0.21

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.62

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.55

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.57

M_CAP

Pathogenic

0.57

MetaRNN

Benign

0.17

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.0

MutationTaster

Benign

0.99

PrimateAI

Pathogenic

0.94

PROVEAN

Benign

-0.10

REVEL

Benign

0.091

Sift

Benign

0.36

Sift4G

Benign

0.44

Polyphen

0.0

Vest4

0.11

MutPred

0.26

Loss of loop (P = 0.0073);

MVP

0.43

MPC

1.6

ClinPred

0.37

GERP RS

4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.093

gMVP

0.45

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over