4-142028804-G-A

Variant names:

• chr4-142028804-G-A
• rs751665731
• NM_001101669.3:c.2753C>T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001101669.3(INPP4B):​c.2753C>T​(p.Thr918Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T918N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: INPP4B NM_001101669.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

INPP4B (HGNC:6075): (inositol polyphosphate-4-phosphatase type II B) INPP4B encodes the inositol polyphosphate 4-phosphatase type II, one of the enzymes involved in phosphatidylinositol signaling pathways. This enzyme removes the phosphate group at position 4 of the inositol ring from inositol 3,4-bisphosphate. There is limited data to suggest that the human type II enzyme is subject to alternative splicing, as has been established for the type I enzyme. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.791

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
INPP4B	NM_001101669.3	c.2753C>T	p.Thr918Ile	missense_variant	Exon 26 of 26	ENST00000262992.9	NP_001095139.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
INPP4B	ENST00000262992.9	c.2753C>T	p.Thr918Ile	missense_variant	Exon 26 of 26	5	NM_001101669.3	ENSP00000262992.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.17
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.66	D;D;D
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.92
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	.;D;.
M_CAP	Benign	0.039	D
MetaRNN	Pathogenic	0.79	D;D;D
MetaSVM	Benign	-0.54	T
MutationAssessor	Uncertain	2.8	M;M;M
PhyloP100		10
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-4.8	D;D;D
REVEL	Uncertain	0.50
Sift	Uncertain	0.0010	D;D;D
Sift4G	Uncertain	0.0030	D;D;D
Polyphen		1.0	D;D;D
Vest4		0.79
MutPred		0.26		Gain of catalytic residue at T918 (P = 0.0101);Gain of catalytic residue at T918 (P = 0.0101);Gain of catalytic residue at T918 (P = 0.0101);
MVP		0.44
MPC		0.77
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.45
Mutation Taster		=41/59	disease causing

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: rs751665731; hg19: chr4-142949957;