2-108469721-T-C

Position:

• chr2-108469721-T-C

Variant summary

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

The NM_181453.4(GCC2):​c.392T>C​(p.Ile131Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000753 in 1,460,110 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: GCC2 NM_181453.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.61

Genes affected

GCC2 (HGNC:23218): (GRIP and coiled-coil domain containing 2) The protein encoded by this gene is a peripheral membrane protein localized to the trans-Golgi network. It is sensitive to brefeldin A. This encoded protein contains a GRIP domain which is thought to be used in targeting. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2009]

GCC2 (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=0.15477845).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GCC2	NM_181453.4	c.392T>C	p.Ile131Thr	missense_variant	6/23	ENST00000309863.11	NP_852118.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GCC2	ENST00000309863.11	c.392T>C	p.Ile131Thr	missense_variant	6/23	5	NM_181453.4	ENSP00000307939.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000753 AC: 11 AN: 1460110 Hom.: 0 Cov.: 30 AF XY: 0.00000826 AC XY: 6 AN XY: 726432

Gnomad4 AFR exome AF: 0.0000299

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: 0.00000720

Gnomad4 OTH exome AF: 0.0000332

GnomAD4 genome Cov.: 33

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

Aug 17, 2022

The c.392T>C (p.I131T) alteration is located in exon 6 (coding exon 6) of the GCC2 gene. This alteration results from a T to C substitution at nucleotide position 392, causing the isoleucine (I) at amino acid position 131 to be replaced by a threonine (T). 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	Benign	0.072
BayesDel_addAF	Uncertain	0.041	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.075	T;T;T
Eigen	Benign	0.10
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.61	T;T;T
M_CAP	Benign	0.0069	T
MetaRNN	Benign	0.15	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.1	M;.;.
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.9	N;D;N
REVEL	Benign	0.16
Sift	Uncertain	0.023	D;D;D
Sift4G	Benign	0.12	T;D;T
Polyphen		0.55	P;.;.
Vest4		0.50
MutPred		0.28		Gain of ubiquitination at K135 (P = 0.0388);.;.;
MVP		0.43
MPC		0.082
ClinPred		0.42	T
GERP RS		5.4
Varity_R		0.13
gMVP		0.45

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

LitVar

Other links and lift over

dbSNP: rs868566268; hg19: chr2-109086177;