19-35742670-C-G

Variant names:

• chr19-35742670-C-G
• rs1334740707
• ENST00000292879.9:c.537G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_144987.4(U2AF1L4):​c.537G>C​(p.Trp179Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,776 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: U2AF1L4 NM_144987.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.465

Genes affected

U2AF1L4 (HGNC:23020): (U2 small nuclear RNA auxiliary factor 1 like 4) Predicted to enable pre-mRNA 3'-splice site binding activity. Predicted to be involved in mRNA splicing, via spliceosome. Predicted to be located in nucleoplasm. Predicted to be part of U2AF complex and spliceosomal complex. [provided by Alliance of Genome Resources, Apr 2022]

ENSG00000267120 (HGNC:):

IGFLR1 (HGNC:23620): (IGF like family receptor 1) Located in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.074695736).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
U2AF1L4	NM_001040425.3	c.*49G>C		3_prime_UTR_variant	Exon 6 of 6	ENST00000378975.8	NP_001035515.1
IGFLR1	NM_024660.4	c.-318G>C		upstream_gene_variant		ENST00000246532.6	NP_078936.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
U2AF1L4	ENST00000378975	c.*49G>C		3_prime_UTR_variant	Exon 6 of 6	1	NM_001040425.3	ENSP00000368258.2
ENSG00000267120	ENST00000589807.1	n.*223-51G>C		intron_variant	Intron 6 of 10	2		ENSP00000472696.1
IGFLR1	ENST00000246532.6	c.-318G>C		upstream_gene_variant		1	NM_024660.4	ENSP00000246532.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000400 AC: 1 AN: 250030 Hom.: 0 AF XY: 0.00000740 AC XY: 1 AN XY: 135172

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000291

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460776 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 726640

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Feb 20, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.537G>C (p.W179C) alteration is located in exon 6 (coding exon 6) of the U2AF1L4 gene. This alteration results from a G to C substitution at nucleotide position 537, causing the tryptophan (W) at amino acid position 179 to be replaced by a cysteine (C). 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
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	5.8
DANN	Benign	0.96
Eigen	Benign	-0.90
Eigen_PC	Benign	-0.91
FATHMM_MKL	Benign	0.045	N
LIST_S2	Benign	0.35	T
M_CAP	Benign	0.0067	T
MetaRNN	Benign	0.075	T
MetaSVM	Benign	-0.94	T
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.035
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.059	T
Polyphen		0.0020	B
Vest4		0.23
MutPred		0.38		Gain of disorder (P = 0.0645);
MVP		0.055
MPC		0.65
ClinPred		0.68	D
GERP RS		0.88
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.31

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1334740707; hg19: chr19-36233571;