Genetic Variant LMX1A:p.Thr291Lys (chr1-165205980-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_177398.4(LMX1A):c.872C>A(p.Thr291Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000688 in 1,454,374 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T291M) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

LMX1A
NM_177398.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.38

Publications

2 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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_177398.4. 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
	LMX1A	NM_177398.4	MANE Select	c.872C>A	p.Thr291Lys	missense	Exon 8 of 9	NP_796372.1	Q8TE12-1
	LMX1A	NM_001174069.2		c.872C>A	p.Thr291Lys	missense	Exon 8 of 9	NP_001167540.1	Q8TE12-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
LMX1A	ENST00000342310.7	TSL:2 MANE Select	c.872C>A	p.Thr291Lys	missense	Exon 8 of 9	ENSP00000340226.3	Q8TE12-1
LMX1A	ENST00000367893.4	TSL:1	c.872C>A	p.Thr291Lys	missense	Exon 7 of 8	ENSP00000356868.4	Q8TE12-1
LMX1A	ENST00000489443.2	TSL:1	n.506C>A		non_coding_transcript_exon	Exon 6 of 7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.88e-7

AC:

AN:

1454374

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

723130

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33006

American (AMR)

AF:

0.00

AC:

AN:

43324

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25678

East Asian (EAS)

AF:

0.00

AC:

AN:

39374

South Asian (SAS)

AF:

0.00

AC:

AN:

85138

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53280

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5722

European-Non Finnish (NFE)

AF:

9.02e-7

AC:

AN:

1108854

Other (OTH)

AF:

0.00

AC:

AN:

59998

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.34

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Uncertain

0.050

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.44

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.76

M_CAP

Uncertain

0.10

MetaRNN

Uncertain

0.74

MetaSVM

Uncertain

0.079

MutationAssessor

Uncertain

2.2

PhyloP100

7.4

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-1.5

REVEL

Uncertain

0.48

Sift

Uncertain

0.026

Sift4G

Benign

0.31

Polyphen

0.94

Vest4

0.77

MutPred

0.27

Gain of methylation at T291 (P = 0.0019)

MVP

0.69

MPC

0.60

ClinPred

0.97

GERP RS

5.4

Varity_R

0.23

gMVP

0.41

Mutation Taster

=75/25

polymorphism

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over