NM_001174147.2:c.559+20G>C

Variant names:

• chr9-126691088-G-C
• rs76196383
• NM_001174147.2:c.559+20G>C

Variant summary

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

The NM_001174147.2(LMX1B):​c.559+20G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000021 in 1,425,340 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: 0.0000021 (0 hom.)
• Consequence: LMX1B NM_001174147.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.685
• Publications: 0 publications found

Genes affected

LMX1B (HGNC:6654): (LIM homeobox transcription factor 1 beta) This gene encodes a member of LIM-homeodomain family of proteins containing two N-terminal zinc-binding LIM domains, 1 homeodomain, and a C-terminal glutamine-rich domain. It functions as a transcription factor, and is essential for the normal development of dorsal limb structures, the glomerular basement membrane, the anterior segment of the eye, and dopaminergic and serotonergic neurons. Mutations in this gene are associated with nail-patella syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2010]

LMX1B Gene-Disease associations (from GenCC):

• nail-patella syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, G2P
• nail-patella-like renal disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

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=-0.71).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LMX1B	NM_001174147.2	c.559+20G>C		intron_variant	Intron 3 of 7	ENST00000373474.9	NP_001167618.1
LMX1B	NM_001174146.2	c.559+20G>C		intron_variant	Intron 3 of 7		NP_001167617.1
LMX1B	NM_002316.4	c.559+20G>C		intron_variant	Intron 3 of 7		NP_002307.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LMX1B	ENST00000373474.9	c.559+20G>C		intron_variant	Intron 3 of 7	1	NM_001174147.2	ENSP00000362573.3
LMX1B	ENST00000355497.10	c.559+20G>C		intron_variant	Intron 3 of 7	1		ENSP00000347684.5
LMX1B	ENST00000526117.6	c.559+20G>C		intron_variant	Intron 3 of 7	1		ENSP00000436930.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000210 AC: 3 AN: 1425340 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 708718

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000307 AC: 1 AN: 32558

American (AMR) AF: 0.00 AC: 0 AN: 41890

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25640

East Asian (EAS) AF: 0.00 AC: 0 AN: 38226

South Asian (SAS) AF: 0.00 AC: 0 AN: 83612

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51880

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5708

European-Non Finnish (NFE) AF: 0.00000184 AC: 2 AN: 1086750

Other (OTH) AF: 0.00 AC: 0 AN: 59076

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	11
DANN	Benign	0.84
PhyloP100		0.69

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: rs76196383; hg19: chr9-129453367;