NM_000234.3:c.1821+35G>C

Variant names:

• chr19-48131041-C-G
• rs3730994
• NM_000234.3:c.1821+35G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000234.3(LIG1):​c.1821+35G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000709 in 1,410,944 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: LIG1 NM_000234.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.628
• Publications: 0 publications found

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: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000234.3. 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
	LIG1	NM_000234.3	MANE Select	c.1821+35G>C		intron	N/A	NP_000225.1	P18858-1
	LIG1	NM_001320970.2		c.1818+35G>C		intron	N/A	NP_001307899.1	A0A8V8TQC4
	LIG1	NM_001320971.2		c.1731+35G>C		intron	N/A	NP_001307900.1	A0A8V8TPH8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LIG1	ENST00000263274.12	TSL:1 MANE Select	c.1821+35G>C		intron	N/A	ENSP00000263274.6	P18858-1
	LIG1	ENST00000594759.5	TSL:1	n.1818+35G>C		intron	N/A	ENSP00000471380.1	M0R0Q7
	LIG1	ENST00000916675.1		c.1923+35G>C		intron	N/A	ENSP00000586734.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.09e-7 AC: 1 AN: 1410944 Hom.: 0 Cov.: 23 AF XY: 0.00000142 AC XY: 1 AN XY: 704874

African (AFR) AF: 0.00 AC: 0 AN: 32504

American (AMR) AF: 0.00 AC: 0 AN: 44634

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25796

East Asian (EAS) AF: 0.00 AC: 0 AN: 39454

South Asian (SAS) AF: 0.00 AC: 0 AN: 85286

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53208

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5650

European-Non Finnish (NFE) AF: 9.38e-7 AC: 1 AN: 1065734

Other (OTH) AF: 0.00 AC: 0 AN: 58678

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.91
DANN	Benign	0.62
PhyloP100		-0.63

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: rs3730994; hg19: chr19-48634298;