chr18-22171910-G-T

Variant names:

• chr18-22171910-G-T
• rs1555628783
• NM_005257.6:c.766G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005257.6(GATA6):​c.766G>T​(p.Ala256Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000984 in 1,016,296 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign 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. A256T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 9.8e-7 (0 hom.)
• Consequence: GATA6 NM_005257.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.100
• Publications: 0 publications found

Genes affected

GATA6 (HGNC:4174): (GATA binding protein 6) This gene is a member of a small family of zinc finger transcription factors that play an important role in the regulation of cellular differentiation and organogenesis during vertebrate development. This gene is expressed during early embryogenesis and localizes to endo- and mesodermally derived cells during later embryogenesis and thereby plays an important role in gut, lung, and heart development. Mutations in this gene are associated with several congenital defects. [provided by RefSeq, Mar 2012]

GATA6 Gene-Disease associations (from GenCC):

• atrial septal defect 9

  Inheritance: AD Classification: DEFINITIVE, LIMITED Submitted by: G2P, Ambry Genetics
• atrioventricular septal defect 5

  Inheritance: AD Classification: DEFINITIVE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• GATA6-related congenital heart disease with or without pancreatic agenesis or neonatal diabetes

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• pancreatic hypoplasia-diabetes-congenital heart disease syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• metabolic syndrome

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

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• tetralogy of fallot

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• familial atrial fibrillation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• conotruncal heart malformations

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21453291).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GATA6	NM_005257.6	c.766G>T	p.Ala256Ser	missense_variant	Exon 2 of 7	ENST00000269216.10	NP_005248.2
GATA6	XM_047437483.1	c.766G>T	p.Ala256Ser	missense_variant	Exon 2 of 7		XP_047293439.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GATA6	ENST00000269216.10	c.766G>T	p.Ala256Ser	missense_variant	Exon 2 of 7	1	NM_005257.6	ENSP00000269216.3
GATA6	ENST00000581694.1	c.766G>T	p.Ala256Ser	missense_variant	Exon 1 of 6	1		ENSP00000462313.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 9.84e-7 AC: 1 AN: 1016296 Hom.: 0 Cov.: 29 AF XY: 0.00000209 AC XY: 1 AN XY: 478888

African (AFR) AF: 0.00 AC: 0 AN: 20498

American (AMR) AF: 0.00 AC: 0 AN: 6370

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 11342

East Asian (EAS) AF: 0.00 AC: 0 AN: 20042

South Asian (SAS) AF: 0.00 AC: 0 AN: 18980

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 18542

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2548

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 879110

Other (OTH) AF: 0.0000257 AC: 1 AN: 38864

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.051	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	5.6
DANN	Benign	0.87
DEOGEN2	Uncertain	0.62	D;D
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.17	N
LIST_S2	Benign	0.40	.;T
M_CAP	Pathogenic	0.90	D
MetaRNN	Benign	0.21	T;T
MetaSVM	Uncertain	-0.17	T
MutationAssessor	Benign	1.1	L;L
PhyloP100		-0.10
PrimateAI	Pathogenic	0.86	D
PROVEAN	Benign	0.21	N;.
REVEL	Benign	0.21
Sift	Benign	1.0	T;.
Sift4G	Benign	1.0	T;T
Polyphen		0.0	B;B
Vest4		0.074
MutPred		0.39		Gain of glycosylation at A256 (P = 0.0012);Gain of glycosylation at A256 (P = 0.0012);
MVP		0.73
ClinPred		0.067	T
GERP RS		-0.80
Varity_R		0.043
gMVP		0.31
Mutation Taster		=92/8	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: rs1555628783; hg19: chr18-19751871;