1-201899974-T-A

Position:

• chr1-201899974-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_012134.3(LMOD1):​c.1039A>T​(p.Ile347Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000658 in 152,008 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: LMOD1 NM_012134.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.18

Genes affected

LMOD1 (HGNC:6647): (leiomodin 1) The leiomodin 1 protein has a putative membrane-spanning region and 2 types of tandemly repeated blocks. The transcript is expressed in all tissues tested, with the highest levels in thyroid, eye muscle, skeletal muscle, and ovary. Increased expression of leiomodin 1 may be linked to Graves' disease and thyroid-associated ophthalmopathy. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LMOD1	NM_012134.3	c.1039A>T	p.Ile347Phe	missense_variant	2/3	ENST00000367288.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LMOD1	ENST00000367288.5	c.1039A>T	p.Ile347Phe	missense_variant	2/3	1	NM_012134.3	P1
	ENST00000414927.5	n.490T>A		non_coding_transcript_exon_variant	3/3	3
	ENST00000458139.1	n.596T>A		non_coding_transcript_exon_variant	3/3	3

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152008 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 39

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152008 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74248

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 22, 2023

The c.1039A>T (p.I347F) alteration is located in exon 2 (coding exon 2) of the LMOD1 gene. This alteration results from a A to T substitution at nucleotide position 1039, causing the isoleucine (I) at amino acid position 347 to be replaced by a phenylalanine (F). 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	Uncertain	0.56
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.23	T
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.83	T
M_CAP	Uncertain	0.18	D
MetaRNN	Uncertain	0.47	T
MetaSVM	Uncertain	0.47	D
MutationAssessor	Benign	1.6	L
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.5	N
REVEL	Pathogenic	0.70
Sift	Uncertain	0.020	D
Sift4G	Uncertain	0.023	D
Polyphen		0.97	D
Vest4		0.43
MutPred		0.72		Gain of catalytic residue at I347 (P = 0.0633);
MVP		0.64
MPC		1.1
ClinPred		0.90	D
GERP RS		5.1
Varity_R		0.35
gMVP		0.49

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

LitVar

Other links and lift over

dbSNP: rs1228973026; hg19: chr1-201869102;