2-219210291-T-A

Variant names:

• chr2-219210291-T-A
• rs1950559890
• NM_005689.4:c.2359A>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_005689.4(ABCB6):​c.2359A>T​(p.Thr787Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T787A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCB6 NM_005689.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.69
• Publications: 0 publications found

Genes affected

ABCB6 (HGNC:47): (ATP binding cassette subfamily B member 6 (LAN blood group)) This gene encodes a member of the ATP-binding cassette (ABC) transporter superfamily. ABC proteins transport various molecules across extra- and intra-cellular membranes. This protein is a member of the heavy metal importer subfamily and plays a role in porphyrin transport. This gene is the molecular basis of the Langereis (Lan) blood group antigen and mutations in this gene underlie familial pseudohyperkalemia and dyschromatosis universalis hereditaria. [provided by RefSeq, Mar 2017]

ABCB6 Gene-Disease associations (from GenCC):

• dyschromatosis universalis hereditaria 3

  Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P
• dyschromatosis universalis hereditaria

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial pseudohyperkalemia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• microphthalmia, isolated, with coloboma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• microphthalmia, isolated, with coloboma 7

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen

ENSG00000284820 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.929

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005689.4. 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
	ABCB6	NM_005689.4	MANE Select	c.2359A>T	p.Thr787Ser	missense	Exon 18 of 19	NP_005680.1	Q9NP58-1
	ABCB6	NM_001349828.2		c.2221A>T	p.Thr741Ser	missense	Exon 17 of 18	NP_001336757.1	Q9NP58-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCB6	ENST00000265316.9	TSL:1 MANE Select	c.2359A>T	p.Thr787Ser	missense	Exon 18 of 19	ENSP00000265316.3	Q9NP58-1
	ENSG00000284820	ENST00000446716.5	TSL:2	n.*4143A>T		non_coding_transcript_exon	Exon 21 of 22	ENSP00000398528.1	H7C152
	ENSG00000284820	ENST00000446716.5	TSL:2	n.*4143A>T		3_prime_UTR	Exon 21 of 22	ENSP00000398528.1	H7C152

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.45	T
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.099	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Benign	-0.30	T
MutationAssessor	Benign	1.5	L
PhyloP100		5.7
PrimateAI	Uncertain	0.62	T
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.65
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.65
MutPred		0.84		Loss of catalytic residue at T787 (P = 0.127)
MVP		0.81
MPC		0.76
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.91
gMVP		0.49
Mutation Taster		=25/75	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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: rs1950559890; hg19: chr2-220075013;