4-122175895-C-A

Position:

chr4-122175895-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 3P and 3B. PM2PP2BP4_ModerateBS1_Supporting

The NM_001384125.1(BLTP1):c.339C>A(p.Asn113Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000373 in 1,529,006 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 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

BLTP1
NM_001384125.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.784

Variant links:

Genes affected

BLTP1 (HGNC:26953): (bridge-like lipid transfer protein family member 1) This gene is located on the long arm of chromosome 4 in a region that is associated with susceptibility to celiac disease. The encoded protein is similar to a Chinese hamster protein that is associated with spermatocyte and adipocyte differentiation. The C-terminus of the protein is also similar to a Caenorhabditis elegans protein that plays a role in lipid storage. In mammals, this protein is thought to function in the regulation of epithelial growth and differentiation, and in tumor development. [provided by RefSeq, Oct 2009]

BLTP1 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;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), BLTP1. . Gene score misZ 6.0015 (greater than the threshold 3.09). Trascript score misZ 7.6647 (greater than threshold 3.09). GenCC has associacion of gene with Alkuraya-Kucinskas syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.21864957).

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.0000263 (4/151890) while in subpopulation SAS AF= 0.000837 (4/4778). AF 95% confidence interval is 0.000286. There are 0 homozygotes in gnomad4. There are 2 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BLTP1	NM_001384125.1 linkuse as main transcript	c.339C>A	p.Asn113Lys	missense_variant	6/88	ENST00000679879.1	NP_001371054.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BLTP1	ENST00000679879.1 linkuse as main transcript	c.339C>A	p.Asn113Lys	missense_variant	6/88		NM_001384125.1	ENSP00000505357	A2

Frequencies

GnomAD3 genomes

AF:

0.0000264

AC:

AN:

151772

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:

0.000836

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000733

AC:

AN:

245566

Hom.:

AF XY:

0.0000824

AC XY:

AN XY:

133432

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:

0.000565

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000169

GnomAD4 exome

AF:

0.0000385

AC:

AN:

1377116

Hom.:

Cov.:

AF XY:

0.0000536

AC XY:

AN XY:

689928

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:

0.000585

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000193

Gnomad4 OTH exome

AF:

0.0000348

GnomAD4 genome

AF:

0.0000263

AC:

AN:

151890

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74252

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:

0.000837

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.000116

AC:

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

Aug 28, 2023

The c.339C>A (p.N113K) alteration is located in exon 4 (coding exon 4) of the KIAA1109 gene. This alteration results from a C to A substitution at nucleotide position 339, causing the asparagine (N) at amino acid position 113 to be replaced by a lysine (K). 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

Pathogenic

0.77

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.56

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.014

T;T

Eigen

Benign

-0.021

Eigen_PC

Benign

-0.028

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.94

.;D

M_CAP

Benign

0.021

MetaRNN

Benign

0.22

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.34

N;N

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Pathogenic

0.83

PROVEAN

Benign

-0.44

N;N

REVEL

Benign

0.13

Sift

Benign

0.40

T;T

Sift4G

Uncertain

0.016

D;D

Polyphen

0.99

D;D

Vest4

0.82

MutPred

0.40

Loss of sheet (P = 0.007);Loss of sheet (P = 0.007);

MVP

0.41

MPC

0.88

ClinPred

0.21

GERP RS

1.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.056

gMVP

0.63

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