Genetic Variant LIG1:p.Ala894Gly (chr19-48115728-G-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_000234.3(LIG1):c.2681C>G(p.Ala894Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,460 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

LIG1
NM_000234.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.04

Publications

0 publications found

Variant links:

Genes affected

LIG1 (HGNC:6598): (DNA ligase 1) This gene encodes a member of the ATP-dependent DNA ligase protein family. The encoded protein functions in DNA replication, recombination, and the base excision repair process. Mutations in this gene that lead to DNA ligase I deficiency result in immunodeficiency and increased sensitivity to DNA-damaging agents. Disruption of this gene may also be associated with a variety of cancers. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

LIG1 Gene-Disease associations (from GenCC):

immunodeficiency 96
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

LIG1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.30175558).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LIG1	NM_000234.3 link	c.2681C>G	p.Ala894Gly	missense_variant	Exon 28 of 28	ENST00000263274.12	NP_000225.1	P18858-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LIG1	ENST00000263274.12 link	c.2681C>G	p.Ala894Gly	missense_variant	Exon 28 of 28	1	NM_000234.3	ENSP00000263274.6		P18858-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461460

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727054

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33464

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111622

Other (OTH)

AF:

0.0000166

AC:

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 11, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2681C>G (p.A894G) alteration is located in exon 28 (coding exon 27) of the LIG1 gene. This alteration results from a C to G substitution at nucleotide position 2681, causing the alanine (A) at amino acid position 894 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Uncertain

0.094

BayesDel_noAF

Benign

-0.10

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.79

D;.;.

Eigen

Benign

0.19

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.87

D;D;D

M_CAP

Benign

0.022

MetaRNN

Benign

0.30

T;T;T

MetaSVM

Benign

-0.42

MutationAssessor

Uncertain

2.8

M;.;.

PhyloP100

6.0

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-3.8

D;D;D

REVEL

Benign

0.27

Sift

Uncertain

0.0010

D;D;D

Sift4G

Uncertain

0.022

D;D;D

Polyphen

0.029

B;B;.

Vest4

0.50

MutPred

0.29

Gain of helix (P = 0.0854);.;.;

MVP

0.68

MPC

0.31

ClinPred

0.99

GERP RS

4.8

Varity_R

0.82

gMVP

0.28

Mutation Taster

=33/67

disease causing

(source)

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

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19-48115728-G-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over