Variant 6-41930266-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_004053.4(BYSL):c.566G>A(p.Arg189Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,461,486 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

BYSL
NM_004053.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.43

Variant links:

Genes affected

BYSL (HGNC:1157): (bystin like) Bystin is expressed as a 2-kb major transcript and a 3.6-kb minor transcript in SNG-M cells and in human trophoblastic teratocarcinoma HT-H cells. Protein binding assays determined that bystin binds directly to trophinin and tastin, and that binding is enhanced when cytokeratins 8 and 18 are present. Immunocytochemistry of HT-H cells showed that bystin colocalizes with trophinin, tastin, and the cytokeratins, suggesting that these molecules form a complex in trophectoderm cells at the time of implantation. Using immunohistochemistry it was determined that trophinin and bystin are found in the placenta from the sixth week of pregnancy. Both proteins were localized in the cytoplasm of the syncytiotrophoblast in the chorionic villi and in endometrial decidual cells at the uteroplacental interface. After week 10, the levels of trophinin, tastin, and bystin decreased and then disappeared from placental villi. [provided by RefSeq, Jul 2008]

BYSL links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.27545634).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BYSL	NM_004053.4 linkuse as main transcript	c.566G>A	p.Arg189Gln	missense_variant	3/7	ENST00000230340.9	NP_004044.3
BYSL	XM_047419281.1 linkuse as main transcript	c.320G>A	p.Arg107Gln	missense_variant	3/7		XP_047275237.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
BYSL	ENST00000230340.9 linkuse as main transcript	c.566G>A	p.Arg189Gln	missense_variant	3/7	1	NM_004053.4	ENSP00000230340	P1
BYSL	ENST00000475702.1 linkuse as main transcript	n.579G>A		non_coding_transcript_exon_variant	3/3	2
BYSL	ENST00000372996.2 linkuse as main transcript	c.239G>A	p.Arg80Gln	missense_variant, NMD_transcript_variant	2/6	5		ENSP00000362087
BYSL	ENST00000489290.1 linkuse as main transcript	c.432-369G>A		intron_variant, NMD_transcript_variant		3		ENSP00000417813

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000803

AC:

AN:

249090

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135256

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000178

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000411

AC:

AN:

1461486

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727028

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:

0.00000540

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

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

Nov 01, 2022

The c.566G>A (p.R189Q) alteration is located in exon 3 (coding exon 3) of the BYSL gene. This alteration results from a G to A substitution at nucleotide position 566, causing the arginine (R) at amino acid position 189 to be replaced by a glutamine (Q). 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

0.13

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.46

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

Eigen

Benign

0.073

Eigen_PC

Uncertain

0.22

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.83

M_CAP

Benign

0.0038

MetaRNN

Benign

0.28

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

MutationTaster

Benign

0.98

PrimateAI

Benign

0.41

PROVEAN

Benign

-1.9

REVEL

Benign

0.14

Sift

Benign

0.26

Sift4G

Benign

0.18

Polyphen

0.014

Vest4

0.43

MutPred

0.64

Loss of MoRF binding (P = 0.0373);

MVP

0.51

MPC

0.42

ClinPred

0.42

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.093

gMVP

0.44

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