rs483353044

Variant names:

• chr12-120999288-G-A
• rs483353044
• NM_000545.8:c.1522G>A

Your query was ambiguous. Multiple possible variants found:

• chr12-120999288-G-A
• chr12-120999288-G-T
• chr12-120999288-G-C

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The c.1522G>A variant in the HNF1 homeobox A gene, HNF1A, causes an amino acid change of glutamic acid to lysine at codon 508 (p.(Glu508Lys)) of transcript NM_000545.8. This variant has a Popmax Filtering allele frequency in gnomAD 2.1.1 of 0.002884, which is greater than the MDEP threshold for BA1 (greater than or equal to 0.0001) (BA1). This variant has been found in many unrelated individuals who do not have autoimmune or absolute/near-absolute insulin-deficient diabetes (PMID:24915262); however, PS4 cannot be applied because the variant MAF in gnomAD is above the ClinGen MDEP PM2_Supporting. Functional studies demonstrated the p.Glu508Lys protein has transactivation activity between 40-80%, which is less severe than typical HNF1A-MODY-causing variants (below 40%) (PMID:32910913, 27899486). In summary, this variant meets the criteria to be classified as benign for monogenic diabetes. ACMG/AMP criteria applied, as specified by the ClinGen MDEP: BA1 (specification version 1.2, approved 6/5/21). However, this variant is an established risk allele for type 2 diabetes in individuals of Mexican ancestry (PMID:24915262). These individuals do not respond to treatment with sulfonylureas, unlike individuals with HNF1A-MODY (PMID:29844095). LINK:https://erepo.genome.network/evrepo/ui/classification/CA289173/MONDO:0015967/017

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00010 (1 hom.)
• Consequence: HNF1A NM_000545.8 missense
• Clinical Significance: Benign reviewed by expert panel U:1 B:6 O:1
• Conservation: PhyloP100: 9.33
• Publications: 49 publications found

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 Gene-Disease associations (from GenCC):

• monogenic diabetes

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• type 1 diabetes mellitus 20

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, Genomics England PanelApp
• diabetes mellitus, noninsulin-dependent

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• maturity-onset diabetes of the young type 3

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• hyperinsulinism due to HNF1A deficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• maturity-onset diabetes of the young

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• nonpapillary renal cell carcinoma

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BA1: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000545.8. 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
	HNF1A	NM_000545.8	MANE Select	c.1522G>A	p.Glu508Lys	missense	Exon 8 of 10	NP_000536.6
	HNF1A	NM_001306179.2		c.1522G>A	p.Glu508Lys	missense	Exon 8 of 10	NP_001293108.2	F5H0K0
	HNF1A	NM_001406915.1		c.1330G>A	p.Glu444Lys	missense	Exon 7 of 9	NP_001393844.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HNF1A	ENST00000257555.11	TSL:1 MANE Select	c.1522G>A	p.Glu508Lys	missense	Exon 8 of 10	ENSP00000257555.5	P20823-1
	HNF1A	ENST00000544413.2	TSL:1	c.1522G>A	p.Glu508Lys	missense	Exon 8 of 10	ENSP00000438804.1	F5H0K0
	HNF1A	ENST00000540108.1	TSL:1	n.*962G>A		non_coding_transcript_exon	Exon 7 of 9	ENSP00000445445.1	P20823-8

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152140 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000486 AC: 122 AN: 251000 AF XY: 0.000309

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00338

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000265

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000105 AC: 153 AN: 1461714 Hom.: 1 Cov.: 32 AF XY: 0.0000715 AC XY: 52 AN XY: 727164

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00291 AC: 130 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000580 AC: 5 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53260

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

European-Non Finnish (NFE) AF: 0.0000117 AC: 13 AN: 1111996

Other (OTH) AF: 0.0000828 AC: 5 AN: 60394

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152140 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74308

African (AFR) AF: 0.00 AC: 0 AN: 41430

American (AMR) AF: 0.000262 AC: 4 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10598

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.000162

ExAC AF: 0.000436 AC: 53

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.000109

EpiControl AF: 0.000119

ClinVar

ClinVar submissions

Significance: Benign

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	-	2	not specified (2)
-	-	1	HNF1A-related disorder (1)
-	-	1	Maturity-onset diabetes of the young (1)
-	1	-	Maturity-onset diabetes of the young type 3 (1)
-	-	1	Monogenic diabetes (1)
-	-	1	not provided (1)
-	-	-	Type 2 diabetes mellitus (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.54
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	32
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.69	D
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D
M_CAP	Pathogenic	0.41	D
MetaRNN	Benign	0.15	T
MetaSVM	Pathogenic	1.0	D
PhyloP100		9.3
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-2.1	N
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.029	D
Polyphen		0.99	D
Vest4		0.76
MutPred		0.74		Gain of methylation at E508 (P = 0.0019)
MVP		0.98
MPC		0.39
ClinPred		0.23	T
GERP RS		4.1
gMVP		0.66
Mutation Taster		=54/46	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs483353044; hg19: chr12-121437091; COSMIC: COSV105084631; COSMIC: COSV105084631;