14-21211419-C-G

Position:

• chr14-21211419-C-G

Variant summary

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

The NM_004500.4(HNRNPC):​c.785G>C​(p.Arg262Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000705 in 1,417,910 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: HNRNPC NM_004500.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.25

Genes affected

HNRNPC (HGNC:5035): (heterogeneous nuclear ribonucleoprotein C) 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 can act as a tetramer and is involved in the assembly of 40S hnRNP particles. Multiple transcript variants encoding at least two different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

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=0.22953287).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HNRNPC	NM_004500.4	c.785G>C	p.Arg262Pro	missense_variant	8/9	ENST00000553300.6	NP_004491.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HNRNPC	ENST00000553300.6	c.785G>C	p.Arg262Pro	missense_variant	8/9	1	NM_004500.4	ENSP00000450544	P3

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 7.05e-7 AC: 1 AN: 1417910 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 706598

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 9.22e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 26, 2023

The c.824G>C (p.R275P) alteration is located in exon 8 (coding exon 6) of the HNRNPC gene. This alteration results from a G to C substitution at nucleotide position 824, causing the arginine (R) at amino acid position 275 to be replaced by a proline (P). 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	Uncertain	0.43
BayesDel_addAF	Benign	-0.026	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	24
DANN	Benign	0.93
DEOGEN2	Benign	0.016	T;.;T;.;.;T;.;T;.;.;T;.;.;T;T;.;.
Eigen	Uncertain	0.27
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.60	.;.;.;T;.;T;T;T;T;T;.;.;T;T;T;T;D
M_CAP	Benign	0.0091	T
MetaRNN	Benign	0.20	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.2	T
MutationAssessor	Benign	1.1	.;.;L;.;.;.;.;.;.;.;L;.;.;L;.;.;.
MutationTaster	Benign	0.92	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-1.1	N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N
REVEL	Benign	0.16
Sift	Benign	0.30	T;T;T;T;T;T;T;T;D;T;T;T;T;T;T;T;D
Sift4G	Benign	0.24	T;T;T;T;T;T;T;T;T;T;T;T;T;T;.;T;D
Polyphen		0.82	P;B;B;.;B;P;B;.;P;P;B;B;B;B;.;.;.
Vest4		0.42
MutPred		0.14		.;.;Gain of loop (P = 0.0502);.;.;.;.;.;.;.;Gain of loop (P = 0.0502);.;.;Gain of loop (P = 0.0502);.;.;.;
MVP		0.39
ClinPred		0.54	D
GERP RS		5.8
Varity_R		0.36
gMVP		0.14

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

LitVar

Other links and lift over

dbSNP: rs932941913; hg19: chr14-21679578;