Genetic Variant SYCP3:p.Thr219Thr (chr12-101729109-A-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 1P and 3B. PP5BP4BP7BS2_Supporting

The NM_001177949.2(SYCP3):c.657T>C(p.Thr219Thr) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000659 in 1,609,016 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000069 ( 0 hom. )

Consequence

SYCP3
NM_001177949.2 splice_region, synonymous

Scores

Splicing: ADA: 0.009885

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 1.29

Publications

10 publications found

Variant links:

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 links:

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]

CHPT1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PP5

Variant 12-101729109-A-G is Pathogenic according to our data. Variant chr12-101729109-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 5373.Status of the report is no_assertion_criteria_provided, 0 stars.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.51). . Strength limited to SUPPORTING due to the PP5.

BP7

Synonymous conserved (PhyloP=1.29 with no splicing effect.

BS2

High AC in GnomAd4 at 6 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001177949.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SYCP3	NM_001177949.2	MANE Select	c.657T>C	p.Thr219Thr	splice_region synonymous	Exon 8 of 9	NP_001171420.1
SYCP3	NM_001177948.2		c.657T>C	p.Thr219Thr	splice_region synonymous	Exon 8 of 9	NP_001171419.1
SYCP3	NM_153694.5		c.657T>C	p.Thr219Thr	splice_region synonymous	Exon 8 of 9	NP_710161.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SYCP3	ENST00000392924.2	TSL:1 MANE Select	c.657T>C	p.Thr219Thr	splice_region synonymous	Exon 8 of 9	ENSP00000376655.1
SYCP3	ENST00000266743.6	TSL:1	c.657T>C	p.Thr219Thr	splice_region synonymous	Exon 8 of 9	ENSP00000266743.2
SYCP3	ENST00000392927.7	TSL:1	c.657T>C	p.Thr219Thr	splice_region synonymous	Exon 8 of 9	ENSP00000376658.3

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152056

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00115

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000563

AC:

AN:

248750

AF XY:

0.0000520

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000710

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000686

AC:

100

AN:

1456960

Hom.:

Cov.:

AF XY:

0.0000552

AC XY:

AN XY:

724982

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33340

American (AMR)

AF:

0.00

AC:

AN:

44580

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26074

East Asian (EAS)

AF:

0.00246

AC:

AN:

39504

South Asian (SAS)

AF:

0.00

AC:

AN:

85884

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53362

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5746

European-Non Finnish (NFE)

AF:

9.02e-7

AC:

AN:

1108270

Other (OTH)

AF:

0.0000332

AC:

AN:

60200

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152056

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74296

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41420

American (AMR)

AF:

0.00

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00115

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10602

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67954

Other (OTH)

AF:

0.00

AC:

AN:

2084

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Spermatogenic failure 4

Pathogenic:1

Jan 01, 2009

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.51

CADD

Benign

(source)

DANN

Benign

0.84

PhyloP100

1.3

Mutation Taster

=64/36

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0099

dbscSNV1_RF

Benign

0.61

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over