chr17-37744659-C-T

Position:

• chr17-37744659-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_000458.4(HNF1B):​c.226G>A​(p.Gly76Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. G76C) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: HNF1B NM_000458.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.68

Genes affected

HNF1B (HGNC:11630): (HNF1 homeobox B) This gene encodes a member of the homeodomain-containing superfamily of transcription factors. The protein binds to DNA as either a homodimer, or a heterodimer with the related protein hepatocyte nuclear factor 1-alpha. The gene has been shown to function in nephron development, and regulates development of the embryonic pancreas. Mutations in this gene result in renal cysts and diabetes syndrome and noninsulin-dependent diabetes mellitus, and expression of this gene is altered in some types of cancer. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 5 uncertain in NM_000458.4
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HNF1B	NM_000458.4	c.226G>A	p.Gly76Ser	missense_variant	1/9	ENST00000617811.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HNF1B	ENST00000617811.5	c.226G>A	p.Gly76Ser	missense_variant	1/9	1	NM_000458.4
HNF1B	ENST00000621123.4	c.226G>A	p.Gly76Ser	missense_variant	1/9	1		P1
HNF1B	ENST00000613727.4	c.226G>A	p.Gly76Ser	missense_variant	1/7	1
HNF1B	ENST00000614313.4	c.226G>A	p.Gly76Ser	missense_variant	1/8	5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.78	D;.;T;T;.;.
Eigen	Pathogenic	0.69
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Pathogenic	0.61	D
MetaRNN	Uncertain	0.60	D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.2	M;M;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.78	T
Sift4G	Benign	0.10	T;T;T;T;T;T
Polyphen		1.0	D;.;.;.;.;.
Vest4		0.35
MutPred		0.53		Gain of phosphorylation at G76 (P = 0.0101);Gain of phosphorylation at G76 (P = 0.0101);Gain of phosphorylation at G76 (P = 0.0101);Gain of phosphorylation at G76 (P = 0.0101);Gain of phosphorylation at G76 (P = 0.0101);Gain of phosphorylation at G76 (P = 0.0101);
MVP		0.95
ClinPred		0.97	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.48
gMVP		0.55

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

Other links and lift over

dbSNP: rs144425830; hg19: chr17-36104650;