NM_177398.4:c.994G>A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_177398.4(LMX1A):c.994G>A(p.Glu332Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00013 in 1,613,924 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00035 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

LMX1A
NM_177398.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.37

Publications

3 publications found

Variant links:

Genes affected

LMX1A (HGNC:6653): (LIM homeobox transcription factor 1 alpha) This gene encodes a homeodomain and LIM-domain containing protein. The encoded protein is a transcription factor that acts as a positive regulator of insulin gene transcription. This gene also plays a role in the development of dopamine producing neurons during embryogenesis. Mutations in this gene are associated with an increased risk of developing Parkinson's disease. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Feb 2012]

LMX1A links:

LMX1A-AS2 (HGNC:40343): (LMX1A antisense RNA 2)

LMX1A-AS2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.09955472).

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.000355 (54/152236) while in subpopulation AMR AF = 0.00268 (41/15298). AF 95% confidence interval is 0.00203. There are 1 homozygotes in GnomAd4. There are 33 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LMX1A	NM_177398.4 link	c.994G>A	p.Glu332Lys	missense_variant	Exon 9 of 9	ENST00000342310.7	NP_796372.1	Q8TE12-1
LMX1A	NM_001174069.2 link	c.994G>A	p.Glu332Lys	missense_variant	Exon 9 of 9		NP_001167540.1	Q8TE12-1
LMX1A	XM_011509538.4 link	c.754G>A	p.Glu252Lys	missense_variant	Exon 7 of 7		XP_011507840.1
LMX1A-AS2	XR_922234.2 link	n.-12C>T		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
LMX1A	ENST00000342310.7 link	c.994G>A	p.Glu332Lys	missense_variant	Exon 9 of 9	2	NM_177398.4	ENSP00000340226.3	Q8TE12-1
LMX1A	ENST00000367893.4 link	c.994G>A	p.Glu332Lys	missense_variant	Exon 8 of 8	1		ENSP00000356868.4	Q8TE12-1
LMX1A	ENST00000489443.2 link	n.628G>A		non_coding_transcript_exon_variant	Exon 7 of 7	1
LMX1A	ENST00000294816.6 link	c.994G>A	p.Glu332Lys	missense_variant	Exon 9 of 9	2		ENSP00000294816.2	Q8TE12-1

Frequencies

GnomAD3 genomes

AF:

0.000355

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00268

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000579

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000207

AC:

AN:

251098

AF XY:

0.000221

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000694

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000107

AC:

156

AN:

1461688

Hom.:

Cov.:

AF XY:

0.000124

AC XY:

AN XY:

727144

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.000492

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.000126

AC:

AN:

39698

South Asian (SAS)

AF:

0.000301

AC:

AN:

86242

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.000176

AC:

AN:

5686

European-Non Finnish (NFE)

AF:

0.0000809

AC:

AN:

1111958

Other (OTH)

AF:

0.000199

AC:

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000355

AC:

AN:

152236

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74432

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41532

American (AMR)

AF:

0.00268

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000580

AC:

AN:

5172

South Asian (SAS)

AF:

0.000415

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68018

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000163

Hom.:

Bravo

AF:

0.000238

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000115

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 20, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.994G>A (p.E332K) alteration is located in exon 9 (coding exon 8) of the LMX1A gene. This alteration results from a G to A substitution at nucleotide position 994, causing the glutamic acid (E) at amino acid position 332 to be replaced by a lysine (K). 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

0.30

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Uncertain

-0.030

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.55

D;D;D

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.93

.;.;D

M_CAP

Benign

0.065

MetaRNN

Benign

0.10

T;T;T

MetaSVM

Benign

-0.35

MutationAssessor

Benign

1.6

L;L;L

PhyloP100

7.4

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.4

N;N;N

REVEL

Uncertain

0.55

Sift

Benign

0.23

T;T;T

Sift4G

Benign

0.30

T;T;T

Polyphen

0.86

P;P;P

Vest4

0.41

MVP

0.73

MPC

0.35

ClinPred

0.073

GERP RS

5.1

Varity_R

0.21

gMVP

0.44

Mutation Taster

=53/47

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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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NM_177398.4:c.994G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over