chr8-10611220-A-G

Position:

• chr8-10611220-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_178857.6(RP1L1):​c.2878T>C​(p.Trp960Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,460,692 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: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: RP1L1 NM_178857.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts P:1 U:2
• Conservation: PhyloP100: 4.80

Genes affected

RP1L1 (HGNC:15946): (RP1 like 1) This gene encodes a member of the doublecortin family. The protein encoded by this gene contains two N-terminal doublecortin domains, which bind microtubules and regulate microtubule polymerization, and two C-terminal large repetitive regions, both of which contain a high percentage of glutamine and glutamic acid residues. This protein is a retinal-specific protein. Its exact length varies among individuals due to the presence of a 16aa repeat in the first C-terminal repetitive region. The 16aa repeat is encoded by the highly polymorphic 48-bp repeat, and 1-6 copies of the 16aa repeat have been identified in normal individuals. The current reference sequence shown here has a single copy of the 16aa repeat. This protein and the RP1 protein, another retinal-specific protein, play essential and synergistic roles in affecting photosensitivity and outer segment morphogenesis of rod photoreceptors. Mutations in this gene cause occult macular dystrophy (OMD). [provided by RefSeq, Sep 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.906

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RP1L1	NM_178857.6	c.2878T>C	p.Trp960Arg	missense_variant	4/4	ENST00000382483.4	NP_849188.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RP1L1	ENST00000382483.4	c.2878T>C	p.Trp960Arg	missense_variant	4/4	1	NM_178857.6	ENSP00000371923	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1460692 Hom.: 0 Cov.: 83 AF XY: 0.00000550 AC XY: 4 AN XY: 726664

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: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000458 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Occult macular dystrophy Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Sep 10, 2010

- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Oct 01, 2018

- -

Retinal dystrophy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Blueprint Genetics

Feb 20, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.17
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.34	T
Eigen	Uncertain	0.26
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.43	T
M_CAP	Pathogenic	0.55	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	-0.27	T
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	0.85	N
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-5.9	D
REVEL	Uncertain	0.61
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.040	D
Vest4		0.85
MutPred		0.66		Gain of disorder (P = 0.0184);
MVP		0.72
ClinPred		0.99	D
GERP RS		4.7
Varity_R		0.71
gMVP		0.60

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs267607018; hg19: chr8-10468730;