chr17-37744584-C-G

Variant names:

• chr17-37744584-C-G
• rs121918671
• NM_000458.4:c.301G>C

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 3P and 4B. PP2 PP3_Moderate BS2

The NM_000458.4(HNF1B):​c.301G>C​(p.Glu101Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000962 in 1,454,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: HNF1B NM_000458.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.98
• Publications: 6 publications found

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]

HNF1B Gene-Disease associations (from GenCC):

• renal cysts and diabetes syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• diabetes mellitus, noninsulin-dependent

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• permanent neonatal diabetes mellitus

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• transient neonatal diabetes mellitus

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• medullary sponge kidney

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• renal dysplasia, bilateral

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• renal dysplasia, unilateral

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• renal hypomagnesemia 2

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• unilateral multicystic dysplastic kidney

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 72 curated pathogenic missense variants (we use a threshold of 10). The gene has 9 curated benign missense variants. Trascript score misZ: 2.0703 (below the threshold of 3.09). GenCC associations: The gene is linked to unilateral multicystic dysplastic kidney, renal dysplasia, unilateral, renal cysts and diabetes syndrome, medullary sponge kidney, renal hypomagnesemia 2, renal dysplasia, bilateral, diabetes mellitus, noninsulin-dependent, transient neonatal diabetes mellitus, permanent neonatal diabetes mellitus.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.867
• BS2: High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HNF1B	NM_000458.4	c.301G>C	p.Glu101Gln	missense_variant	Exon 1 of 9	ENST00000617811.5	NP_000449.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HNF1B	ENST00000617811.5	c.301G>C	p.Glu101Gln	missense_variant	Exon 1 of 9	1	NM_000458.4	ENSP00000480291.1
HNF1B	ENST00000621123.4	c.301G>C	p.Glu101Gln	missense_variant	Exon 1 of 9	1		ENSP00000482711.1
HNF1B	ENST00000613727.4	c.301G>C	p.Glu101Gln	missense_variant	Exon 1 of 7	1		ENSP00000477524.1
HNF1B	ENST00000614313.4	c.301G>C	p.Glu101Gln	missense_variant	Exon 1 of 8	5		ENSP00000482529.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000408 AC: 1 AN: 245210 AF XY: 0.00000749

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000962 AC: 14 AN: 1454878 Hom.: 0 Cov.: 35 AF XY: 0.00000967 AC XY: 7 AN XY: 724090

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26126

East Asian (EAS) AF: 0.00 AC: 0 AN: 39688

South Asian (SAS) AF: 0.0000464 AC: 4 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000899 AC: 10 AN: 1111894

Other (OTH) AF: 0.00 AC: 0 AN: 60340

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Mar 14, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 101 of the HNF1B protein (p.Glu101Gln). This variant is present in population databases (rs121918671, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with HNF1B-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt HNF1B protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.30
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.90	D;.;T;T;.;.
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Uncertain	0.93	D
M_CAP	Pathogenic	0.36	D
MetaRNN	Pathogenic	0.87	D;D;D;D;D;D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Uncertain	2.5	M;M;.;.;.;.
PhyloP100		6.0
PrimateAI	Uncertain	0.65	T
Sift4G	Benign	0.090	T;T;T;T;T;T
Polyphen		0.69	P;.;.;.;.;.
Vest4		0.51
MutPred		0.84		Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);
MVP		0.78
ClinPred		0.94	D
GERP RS		3.2
PromoterAI		-0.034	Neutral
Varity_R		0.40
gMVP		0.74
Mutation Taster		=66/34	polymorphism

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: rs121918671; hg19: chr17-36104575;