rs587777195

Positions:

• chr3-196242085-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Moderate PP5_Moderate

The NM_001312673.2(PCYT1A):​c.571T>C​(p.Phe191Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PCYT1A NM_001312673.2 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 8.94

Genes affected

PCYT1A (HGNC:8754): (phosphate cytidylyltransferase 1A, choline) This gene belongs to the cytidylyltransferase family and is involved in the regulation of phosphatidylcholine biosynthesis. Mutations in this gene are associated with spondylometaphyseal dysplasia with cone-rod dystrophy. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Aug 2015]

SLC51A (HGNC:29955): (solute carrier family 51 member A) Predicted to enable protein heterodimerization activity; protein homodimerization activity; and transmembrane transporter activity. Involved in bile acid secretion. Located in basolateral plasma membrane. Implicated in progressive familial intrahepatic cholestasis. [provided by Alliance of Genome Resources, Apr 2022]

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, 0.899
• PP5: Variant 3-196242085-A-G is Pathogenic according to our data. Variant chr3-196242085-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 101064.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr3-196242085-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PCYT1A	NM_001312673.2	c.571T>C	p.Phe191Leu	missense_variant	7/9	ENST00000431016.6	NP_001299602.1
PCYT1A	NM_005017.4	c.571T>C	p.Phe191Leu	missense_variant	8/10		NP_005008.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PCYT1A	ENST00000431016.6	c.571T>C	p.Phe191Leu	missense_variant	7/9	1	NM_001312673.2	ENSP00000394617	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Spondylometaphyseal dysplasia-cone-rod dystrophy syndrome Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 02, 2014	- -
Pathogenic, criteria provided, single submitter	research	Baylor-Hopkins Center for Mendelian Genomics, Johns Hopkins University School of Medicine	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.55
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.67	D;D;D;D;.;D
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D;.;D;D;D;D
M_CAP	Pathogenic	0.58	D
MetaRNN	Pathogenic	0.90	D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.6	.;M;M;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.93	D
PROVEAN	Pathogenic	-6.0	D;D;D;D;D;D
REVEL	Pathogenic	0.97
Sift	Pathogenic	0.0	D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;T
Polyphen		1.0	.;D;D;.;.;.
Vest4		0.94
MutPred		0.60		Loss of glycosylation at T194 (P = 0.0667);Loss of glycosylation at T194 (P = 0.0667);Loss of glycosylation at T194 (P = 0.0667);Loss of glycosylation at T194 (P = 0.0667);.;.;
MVP		0.97
MPC		2.3
ClinPred		1.0	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.93
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.17		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: rs587777195; hg19: chr3-195968956;