chr8-38169915-T-A

Variant names:

• chr8-38169915-T-A
• rs2130643543
• NM_014462.3:c.118A>T

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PP2 PP3_Strong PP5

The NM_014462.3(LSM1):​c.118A>T​(p.Asn40Tyr) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: LSM1 NM_014462.3 missense, splice_region
• Clinical Significance: Pathogenic/Likely pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.84
• Publications: 0 publications found

Genes affected

LSM1 (HGNC:20472): (LSM1 homolog, mRNA degradation associated) This gene encodes a member of the LSm family of RNA-binding proteins. LSm proteins form stable heteromers that bind specifically to the 3'-terminal oligo(U) tract of U6 snRNA and may play a role in pre-mRNA splicing by mediating U4/U6 snRNP formation. Increased expression of this gene may play a role in cellular transformation and the progression of several malignancies including lung cancer, mesothelioma and breast cancer. Alternatively spliced transcript variants have been observed for this gene, and a pseudogene of this gene is located on the short arm of chromosome 9. [provided by RefSeq, Nov 2011]

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 1 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 1.0017 (below the threshold of 3.09). Trascript score misZ: 0.15829 (below the threshold of 3.09).
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.984
• PP5: Variant 8-38169915-T-A is Pathogenic according to our data. Variant chr8-38169915-T-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 1691228.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014462.3. 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
	LSM1	NM_014462.3	MANE Select	c.118A>T	p.Asn40Tyr	missense splice_region	Exon 3 of 4	NP_055277.1	A0A0S2Z590
	LSM1	NR_045493.1		n.250A>T		splice_region non_coding_transcript_exon	Exon 3 of 4
	LSM1	NR_045492.2		n.288+2050A>T		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LSM1	ENST00000311351.9	TSL:1 MANE Select	c.118A>T	p.Asn40Tyr	missense splice_region	Exon 3 of 4	ENSP00000310596.4	O15116
	LSM1	ENST00000520755.5	TSL:1	c.115+2050A>T		intron	N/A	ENSP00000430021.1	E5RH18
	LSM1	ENST00000520286.5	TSL:1	n.250A>T		splice_region non_coding_transcript_exon	Exon 3 of 4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 24

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	FICUS syndrome (1)
1	-	-	Global developmental delay (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	31
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.85	D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.96
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.52	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.93	D
MutationAssessor	Pathogenic	4.9	H
PhyloP100		7.8
PrimateAI	Pathogenic	0.84	D
PROVEAN	Pathogenic	-7.6	D
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.89		Gain of sheet (P = 0.1208)
MVP		0.89
MPC		1.6
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.85
gMVP		0.98
Mutation Taster		=12/88	disease causing

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: rs2130643543; hg19: chr8-38027433;