NM_031372.4:c.550G>A

Variant names:

• chr4-82428340-C-T
• rs1553901009
• NM_031372.4:c.550G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_031372.4(HNRNPDL):​c.550G>A​(p.Val184Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. V184V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: HNRNPDL NM_031372.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.59
• Publications: 0 publications found

Genes affected

HNRNPDL (HGNC:5037): (heterogeneous nuclear ribonucleoprotein D like) This gene belongs to the subfamily of ubiquitously expressed heterogeneous nuclear ribonucleoproteins (hnRNPs). The hnRNPs are RNA binding proteins and they complex with heterogeneous nuclear RNA (hnRNA). These proteins are associated with pre-mRNAs in the nucleus and appear to influence pre-mRNA processing and other aspects of mRNA metabolism and transport. While all of the hnRNPs are present in the nucleus, some seem to shuttle between the nucleus and the cytoplasm. The hnRNP proteins have distinct nucleic acid binding properties. The protein encoded by this gene has two RRM domains that bind to RNAs. Three alternatively spliced transcript variants have been described for this gene. One of the variants is probably not translated because the transcript is a candidate for nonsense-mediated mRNA decay. The protein isoforms encoded by this gene are similar to its family member HNRPD. [provided by RefSeq, May 2011]

HNRNPDL Gene-Disease associations (from GenCC):

• autosomal dominant limb-girdle muscular dystrophy type 1G

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• muscular dystrophy, limb-girdle, autosomal dominant

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13344598).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HNRNPDL	NM_031372.4	c.550G>A	p.Val184Ile	missense_variant	Exon 2 of 8	ENST00000295470.10	NP_112740.1
HNRNPDL	NM_001207000.1	c.550G>A	p.Val184Ile	missense_variant	Exon 2 of 7		NP_001193929.1
HNRNPDL	NR_003249.2	n.1085G>A		non_coding_transcript_exon_variant	Exon 2 of 9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HNRNPDL	ENST00000295470.10	c.550G>A	p.Val184Ile	missense_variant	Exon 2 of 8	1	NM_031372.4	ENSP00000295470.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal dominant limb-girdle muscular dystrophy type 1G Uncertain:1

Dec 28, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine with isoleucine at codon 184 of the HNRNPDL protein (p.Val184Ile). The valine residue is highly conserved and there is a small physicochemical difference between valine and isoleucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with HNRNPDL-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C25"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.038	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.019	T;T;T;.;.;.
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.0069
FATHMM_MKL	Benign	0.70	D
LIST_S2	Uncertain	0.88	.;D;D;.;.;D
M_CAP	Benign	0.044	D
MetaRNN	Benign	0.13	T;T;T;T;T;T
MetaSVM	Benign	-0.33	T
MutationAssessor	Benign	0.095	N;N;.;.;.;.
PhyloP100		1.6
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-0.11	N;.;.;.;.;.
REVEL	Benign	0.26
Sift	Benign	0.27	T;.;.;.;.;.
Sift4G	Benign	0.21	T;T;T;T;T;T
Polyphen		0.071	B;B;.;.;.;.
Vest4		0.29
MutPred		0.22		Gain of glycosylation at T185 (P = 0.0342);Gain of glycosylation at T185 (P = 0.0342);Gain of glycosylation at T185 (P = 0.0342);.;.;.;
MVP		0.59
MPC		0.52
ClinPred		0.53	D
GERP RS		5.3
Varity_R		0.089
gMVP		0.52
Mutation Taster		=87/13	polymorphism

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: rs1553901009; hg19: chr4-83349493;