15-65050073-G-C

Position:

• chr15-65050073-G-C

Variant summary

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

The NM_178859.4(SLC51B):​c.69G>C​(p.Glu23Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000214 in 1,399,404 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: SLC51B NM_178859.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.429

Genes affected

SLC51B (HGNC:29956): (SLC51 subunit beta) Predicted to enable protein heterodimerization activity and transmembrane transporter activity. Involved in bile acid secretion. Located in basolateral plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

RASL12 (HGNC:30289): (RAS like family 12) Predicted to enable GDP binding activity; GTP binding activity; and GTPase activity. Predicted to be involved in signal transduction. Predicted to be active in plasma membrane. [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=0.23824403).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC51B	NM_178859.4	c.69G>C	p.Glu23Asp	missense_variant	2/4	ENST00000334287.3	NP_849190.2
SLC51B	XM_005254159.6	c.69G>C	p.Glu23Asp	missense_variant	2/4		XP_005254216.1
RASL12	XM_017022296.2	c.*1917C>G		3_prime_UTR_variant	5/5		XP_016877785.1
RASL12	XM_005254434.5	c.426-4329C>G		intron_variant			XP_005254491.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC51B	ENST00000334287.3	c.69G>C	p.Glu23Asp	missense_variant	2/4	2	NM_178859.4	ENSP00000335292.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000214 AC: 3 AN: 1399404 Hom.: 0 Cov.: 30 AF XY: 0.00000435 AC XY: 3 AN XY: 690234

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: 0.00000278

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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

Feb 22, 2023

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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with SLC51B-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 23 of the SLC51B protein (p.Glu23Asp). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Benign	-0.021	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T
Eigen	Uncertain	0.29
Eigen_PC	Benign	0.19
FATHMM_MKL	Benign	0.38	N
LIST_S2	Benign	0.66	T
M_CAP	Benign	0.0048	T
MetaRNN	Benign	0.24	T
MetaSVM	Benign	-0.93	T
MutationAssessor	Uncertain	2.1	M
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-2.8	D
REVEL	Benign	0.13
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.23
MutPred		0.41		Gain of sheet (P = 0.0477);
MVP		0.20
MPC		0.39
ClinPred		0.99	D
GERP RS		0.34
Varity_R		0.65
gMVP		0.15

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: chr15-65342411;