12-120994199-A-G

Position:

• chr12-120994199-A-G

Variant summary

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

The NM_000545.8(HNF1A):​c.749A>G​(p.Gln250Arg) 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.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HNF1A NM_000545.8 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.86

Genes affected

HNF1A (HGNC:11621): (HNF1 homeobox A) The protein encoded by this gene is a transcription factor required for the expression of several liver-specific genes. The encoded protein functions as a homodimer and binds to the inverted palindrome 5'-GTTAATNATTAAC-3'. Defects in this gene are a cause of maturity onset diabetes of the young type 3 (MODY3) and also can result in the appearance of hepatic adenomas. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Apr 2015]

HNF1A (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a DNA_binding_region Homeobox; HNF1-type (size 80) in uniprot entity HNF1A_HUMAN there are 58 pathogenic changes around while only 1 benign (98%) in NM_000545.8
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HNF1A	NM_000545.8	c.749A>G	p.Gln250Arg	missense_variant	4/10	ENST00000257555.11	NP_000536.6
HNF1A	NM_001306179.2	c.749A>G	p.Gln250Arg	missense_variant	4/10		NP_001293108.2
HNF1A	NM_001406915.1	c.749A>G	p.Gln250Arg	missense_variant	4/9		NP_001393844.1
HNF1A	XM_024449168.2	c.749A>G	p.Gln250Arg	missense_variant	4/9		XP_024304936.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HNF1A	ENST00000257555.11	c.749A>G	p.Gln250Arg	missense_variant	4/10	1	NM_000545.8	ENSP00000257555.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.53
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.77	.;D;T;.
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	D;D;D;D
M_CAP	Pathogenic	0.53	D
MetaRNN	Uncertain	0.53	D;D;D;D
MetaSVM	Uncertain	0.68	D
PrimateAI	Pathogenic	0.80	D
PROVEAN	Benign	-1.6	N;.;N;N
REVEL	Uncertain	0.58
Sift	Uncertain	0.010	D;.;D;D
Sift4G	Benign	0.10	T;T;T;T
Polyphen		0.59	.;.;.;P
Vest4		0.61
MutPred		0.27		Gain of MoRF binding (P = 0.0166);Gain of MoRF binding (P = 0.0166);Gain of MoRF binding (P = 0.0166);Gain of MoRF binding (P = 0.0166);
MVP		0.91
MPC		1.9
ClinPred		0.96	D
GERP RS		4.8
gMVP		0.96

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-121432002;