chr7-25123727-A-G

Position:

• chr7-25123727-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP3_Moderate

The NM_018947.6(CYCS):​c.292T>C​(p.Tyr98His) 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CYCS NM_018947.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.09

Genes affected

CYCS (HGNC:19986): (cytochrome c, somatic) This gene encodes a small heme protein that functions as a central component of the electron transport chain in mitochondria. The encoded protein associates with the inner membrane of the mitochondrion where it accepts electrons from cytochrome b and transfers them to the cytochrome oxidase complex. This protein is also involved in initiation of apoptosis. Mutations in this gene are associated with autosomal dominant nonsyndromic thrombocytopenia. Numerous processed pseudogenes of this gene are found throughout the human genome.[provided by RefSeq, Jul 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a helix (size 13) in uniprot entity CYC_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_018947.6
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.907

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYCS	NM_018947.6	c.292T>C	p.Tyr98His	missense_variant	3/3	ENST00000305786.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYCS	ENST00000305786.7	c.292T>C	p.Tyr98His	missense_variant	3/3	1	NM_018947.6	P1
CYCS	ENST00000409409.5	c.292T>C	p.Tyr98His	missense_variant	3/3	3		P1
CYCS	ENST00000409764.5	c.292T>C	p.Tyr98His	missense_variant	4/4	3		P1
CYCS	ENST00000413447.1	c.292T>C	p.Tyr98His	missense_variant	4/4	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Thrombocytopenia 4 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

Sep 15, 2022

PM2, PP3 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D;D;D;T
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.96	D
M_CAP	Pathogenic	0.37	D
MetaRNN	Pathogenic	0.91	D;D;D;D
MetaSVM	Uncertain	0.68	D
MutationAssessor	Pathogenic	4.0	H;H;H;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.80	T
PROVEAN	Pathogenic	-4.7	D;D;D;D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.025	D;D;D;D
Sift4G	Uncertain	0.020	D;D;D;D
Polyphen		0.17	B;B;B;.
Vest4		0.89
MutPred		0.76		Loss of stability (P = 0.0244);Loss of stability (P = 0.0244);Loss of stability (P = 0.0244);Loss of stability (P = 0.0244);
MVP		0.97
MPC		1.5
ClinPred		1.0	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.90
gMVP		0.90

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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: chr7-25163346;