3-125972160-T-C

Position:

• chr3-125972160-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001308313.2(ROPN1B):​c.106T>C​(p.Trp36Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ROPN1B NM_001308313.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.07

Genes affected

ROPN1B (HGNC:31927): (rhophilin associated tail protein 1B) Enables protein heterodimerization activity. Predicted to be involved in several processes, including flagellated sperm motility; protein localization to cilium; and sperm capacitation. Located in cytoplasm and motile cilium. [provided by Alliance of Genome Resources, Apr 2022]

ROPN1B (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.965

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ROPN1B	NM_001308313.2	c.106T>C	p.Trp36Arg	missense_variant	3/7	ENST00000514116.6	NP_001295242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ROPN1B	ENST00000514116.6	c.106T>C	p.Trp36Arg	missense_variant	3/7	1	NM_001308313.2	ENSP00000426271.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461852 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727224

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: 0.0000348

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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 07, 2023

The c.106T>C (p.W36R) alteration is located in exon 2 (coding exon 1) of the ROPN1B gene. This alteration results from a T to C substitution at nucleotide position 106, causing the tryptophan (W) at amino acid position 36 to be replaced by an arginine (R). 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	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.18
CADD	Pathogenic	26
DANN	Benign	0.96
DEOGEN2	Uncertain	0.51	D;D;.;.;T
Eigen	Uncertain	0.36
Eigen_PC	Benign	0.21
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.72	.;T;T;T;T
M_CAP	Uncertain	0.099	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D
MetaSVM	Uncertain	0.042	D
MutationAssessor	Pathogenic	3.1	M;M;.;.;.
PrimateAI	Uncertain	0.73	T
PROVEAN	Pathogenic	-12	D;D;D;D;D
REVEL	Uncertain	0.45
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D
Polyphen		1.0	D;D;.;.;.
Vest4		0.86
MutPred		0.79		Gain of disorder (P = 0.0012);Gain of disorder (P = 0.0012);Gain of disorder (P = 0.0012);Gain of disorder (P = 0.0012);Gain of disorder (P = 0.0012);
MVP		0.88
MPC		0.91
ClinPred		1.0	D
GERP RS		3.4
Varity_R		0.73
gMVP		0.84

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-125691003;