rs1554025656

Variant names:

• chr4-122249571-G-A
• rs1554025656
• NM_001384125.1:c.5599G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The NM_001384125.1(BLTP1):​c.5599G>A​(p.Val1867Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BLTP1 NM_001384125.1 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 5.37
• Publications: 2 publications found

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 Gene-Disease associations (from GenCC):

• Alkuraya-Kucinskas syndrome

  Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 4-122249571-G-A is Pathogenic according to our data. Variant chr4-122249571-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 487548.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.23895693). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001384125.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BLTP1	NM_001384125.1	MANE Select	c.5599G>A	p.Val1867Met	missense	Exon 36 of 88	NP_001371054.1
	BLTP1	NM_015312.4		c.5599G>A	p.Val1867Met	missense	Exon 34 of 84	NP_056127.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BLTP1	ENST00000679879.1	MANE Select	c.5599G>A	p.Val1867Met	missense	Exon 36 of 88	ENSP00000505357.1
	BLTP1	ENST00000388738.8	TSL:1	c.5599G>A	p.Val1867Met	missense	Exon 36 of 85	ENSP00000373390.4
	BLTP1	ENST00000446180.5	TSL:1	c.1315G>A	p.Val439Met	missense	Exon 8 of 22	ENSP00000394909.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Alkuraya-Kucinskas syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.029	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.021	T
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.24	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.90	L
PhyloP100		5.4
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-0.45	N
REVEL	Benign	0.18
Sift	Uncertain	0.024	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.97	D
Vest4		0.42
MutPred		0.36		Gain of helix (P = 0.0854)
MVP		0.43
MPC		1.4
ClinPred		0.80	D
GERP RS		4.3
Varity_R		0.066
gMVP		0.74
Mutation Taster		=14/86	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs1554025656; hg19: chr4-123170726;