12-101731595-A-C

Position:

• chr12-101731595-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001177949.2(SYCP3):​c.525T>G​(p.Ile175Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SYCP3 NM_001177949.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.801

Genes affected

SYCP3 (HGNC:18130): (synaptonemal complex protein 3) This gene encodes an essential structural component of the synaptonemal complex. This complex is involved in synapsis, recombination and segregation of meiotic chromosomes. Mutations in this gene are associated with azoospermia in males and susceptibility to pregnancy loss in females. Alternate splicing results in multiple transcript variants that encode the same protein. [provided by RefSeq, May 2010]

SYCP3 (HGNC:):

CHPT1 (HGNC:17852): (choline phosphotransferase 1) Enables diacylglycerol cholinephosphotransferase activity. Involved in phosphatidylcholine biosynthetic process and platelet activating factor biosynthetic process. Predicted to be located in Golgi membrane. Predicted to be active in Golgi apparatus and endoplasmic reticulum membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28422132).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SYCP3	NM_001177949.2	c.525T>G	p.Ile175Met	missense_variant	7/9	ENST00000392924.2	NP_001171420.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SYCP3	ENST00000392924.2	c.525T>G	p.Ile175Met	missense_variant	7/9	1	NM_001177949.2	ENSP00000376655.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

Aug 05, 2024

The c.525T>G (p.I175M) alteration is located in exon 7 (coding exon 6) of the SYCP3 gene. This alteration results from a T to G substitution at nucleotide position 525, causing the isoleucine (I) at amino acid position 175 to be replaced by a methionine (M). 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	0.14
BayesDel_addAF	Benign	-0.058	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Benign	0.25	T;T;T
Eigen	Benign	-0.11
Eigen_PC	Benign	-0.11
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.79	.;.;T
M_CAP	Benign	0.0041	T
MetaRNN	Benign	0.28	T;T;T
MetaSVM	Benign	-0.88	T
MutationAssessor	Uncertain	2.2	M;M;M
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-2.1	N;N;N
REVEL	Benign	0.11
Sift	Uncertain	0.019	D;D;D
Sift4G	Benign	0.41	T;T;T
Polyphen		0.57	P;P;P
Vest4		0.42
MutPred		0.55		Gain of disorder (P = 0.0657);Gain of disorder (P = 0.0657);Gain of disorder (P = 0.0657);
MVP		0.13
MPC		0.68
ClinPred		0.74	D
GERP RS		2.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.35
gMVP		0.22

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-102125373;