Genetic Variant PLAC1:p.Thr105Thr (chrX-134566368-C-T) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_021796.4(PLAC1):c.315G>A(p.Thr105Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00109 in 1,209,772 control chromosomes in the GnomAD database, including 13 homozygotes. There are 354 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0053 ( 8 hom., 164 hem., cov: 23)

Exomes 𝑓: 0.00067 ( 5 hom. 190 hem. )

Consequence

PLAC1
NM_021796.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -3.43

Publications

3 publications found

Variant links:

Genes affected

PLAC1 (HGNC:9044): (placenta enriched 1) Involved in placenta development. Predicted to be located in extracellular region. [provided by Alliance of Genome Resources, Apr 2022]

PLAC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant X-134566368-C-T is Benign according to our data. Variant chrX-134566368-C-T is described in ClinVar as Benign. ClinVar VariationId is 783914.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00528 (591/111893) while in subpopulation AFR AF = 0.017 (523/30779). AF 95% confidence interval is 0.0158. There are 8 homozygotes in GnomAd4. There are 164 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 8 gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021796.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PLAC1	NM_021796.4	MANE Select	c.315G>A	p.Thr105Thr	synonymous	Exon 3 of 3	NP_068568.1	Q9HBJ0
PLAC1	NM_001316887.2		c.315G>A	p.Thr105Thr	synonymous	Exon 4 of 4	NP_001303816.1	Q9HBJ0
PLAC1	NM_001316888.2		c.315G>A	p.Thr105Thr	synonymous	Exon 3 of 3	NP_001303817.1	Q9HBJ0

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PLAC1	ENST00000359237.9	TSL:1 MANE Select	c.315G>A	p.Thr105Thr	synonymous	Exon 3 of 3	ENSP00000352173.4	Q9HBJ0
PLAC1	ENST00000878501.1		c.315G>A	p.Thr105Thr	synonymous	Exon 4 of 4	ENSP00000548560.1
PLAC1	ENST00000917137.1		c.315G>A	p.Thr105Thr	synonymous	Exon 2 of 2	ENSP00000587196.1

Frequencies

GnomAD3 genomes

AF:

0.00526

AC:

588

AN:

111838

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00504

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000374

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00417

Gnomad NFE

AF:

0.000113

Gnomad OTH

AF:

0.00531

GnomAD2 exomes

AF:

0.00131

AC:

240

AN:

183381

AF XY:

0.000825

show subpopulations

Gnomad AFR exome

AF:

0.0143

Gnomad AMR exome

AF:

0.00106

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000171

Gnomad OTH exome

AF:

0.00110

GnomAD4 exome

AF:

0.000667

AC:

732

AN:

1097879

Hom.:

Cov.:

AF XY:

0.000523

AC XY:

190

AN XY:

363237

show subpopulations

African (AFR)

AF:

0.0184

AC:

486

AN:

26397

American (AMR)

AF:

0.00131

AC:

AN:

35207

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19384

East Asian (EAS)

AF:

0.00

AC:

AN:

30205

South Asian (SAS)

AF:

0.000166

AC:

AN:

54137

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40534

Middle Eastern (MID)

AF:

0.00411

AC:

AN:

4134

European-Non Finnish (NFE)

AF:

0.000114

AC:

AN:

841801

Other (OTH)

AF:

0.00169

AC:

AN:

46080

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

116

154

193

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.00528

AC:

591

AN:

111893

Hom.:

Cov.:

AF XY:

0.00481

AC XY:

164

AN XY:

34071

show subpopulations

African (AFR)

AF:

0.0170

AC:

523

AN:

30779

American (AMR)

AF:

0.00504

AC:

AN:

10522

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2648

East Asian (EAS)

AF:

0.00

AC:

AN:

3562

South Asian (SAS)

AF:

0.000375

AC:

AN:

2665

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6094

Middle Eastern (MID)

AF:

0.00

AC:

AN:

219

European-Non Finnish (NFE)

AF:

0.000113

AC:

AN:

53197

Other (OTH)

AF:

0.00524

AC:

AN:

1526

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00253

Hom.:

Bravo

AF:

0.00645

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000415

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

0.039

(source)

DANN

Benign

0.32

PhyloP100

-3.4

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

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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

Computational scores

Splicing

Publications

Other links and lift over