7-6187083-C-T

Position:

• chr7-6187083-C-T

Variant summary

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

The NM_004227.4(CYTH3):​c.216G>A​(p.Met72Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CYTH3 NM_004227.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.80

Genes affected

CYTH3 (HGNC:9504): (cytohesin 3) This gene encodes a member of the PSCD (pleckstrin homology, Sec7 and coiled-coil domains) family. PSCD family members have identical structural organization that consists of an N-terminal coiled-coil motif, a central Sec7 domain, and a C-terminal pleckstrin homology (PH) domain. The coiled-coil motif is involved in homodimerization, the Sec7 domain contains guanine-nucleotide exchange protein (GEP) activity, and the PH domain interacts with phospholipids and is responsible for association of PSCDs with membranes. Members of this family appear to mediate the regulation of protein sorting and membrane trafficking. This encoded protein is involved in the control of Golgi structure and function, and it may have a physiological role in regulating ADP-ribosylation factor protein 6 (ARF) functions, in addition to acting on ARF1. [provided by RefSeq, Jul 2008]

CYTH3 (HGNC:):

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=0.23045546).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYTH3	NM_004227.4	c.216G>A	p.Met72Ile	missense_variant	4/13	ENST00000350796.8	NP_004218.1
CYTH3	NM_001367580.1	c.-962G>A		5_prime_UTR_variant	4/13		NP_001354509.1
CYTH3	NM_001367581.1	c.-509G>A		5_prime_UTR_variant	4/14		NP_001354510.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYTH3	ENST00000350796.8	c.216G>A	p.Met72Ile	missense_variant	4/13	1	NM_004227.4	ENSP00000297044.7
CYTH3	ENST00000482460.1	n.538G>A		non_coding_transcript_exon_variant	5/5	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Jul 19, 2023

The c.216G>A (p.M72I) alteration is located in exon 4 (coding exon 4) of the CYTH3 gene. This alteration results from a G to A substitution at nucleotide position 216, causing the methionine (M) at amino acid position 72 to be replaced by an isoleucine (I). 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	0.49
BayesDel_addAF	Benign	-0.065	T
BayesDel_noAF	Benign	-0.33
CADD	Uncertain	25
DANN	Benign	0.73
DEOGEN2	Benign	0.22	.;T
Eigen	Benign	-0.28
Eigen_PC	Benign	0.015
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.89	D;D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.23	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-1.4	N;N
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	0.020	N;.
REVEL	Benign	0.15
Sift	Benign	1.0	T;.
Sift4G	Benign	1.0	T;T
Polyphen		0.0	B;.
Vest4		0.47
MutPred		0.31		Loss of disorder (P = 0.0619);Loss of disorder (P = 0.0619);
MVP		0.35
MPC		0.064
ClinPred		0.74	D
GERP RS		5.4
Varity_R		0.49
gMVP		0.42

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: chr7-6226714;