Genetic Variant NM_000295.5:c.522C>T (chr14-94382716-G-A) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_000295.5(SERPINA1):c.522C>T(p.Thr174Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000869 in 1,614,160 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0048 ( 7 hom., cov: 33)

Exomes 𝑓: 0.00046 ( 2 hom. )

Consequence

SERPINA1
NM_000295.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -2.34

Publications

5 publications found

Variant links:

Genes affected

SERPINA1 (HGNC:8941): (serpin family A member 1) The protein encoded by this gene is a serine protease inhibitor belonging to the serpin superfamily whose targets include elastase, plasmin, thrombin, trypsin, chymotrypsin, and plasminogen activator. This protein is produced in the liver, the bone marrow, by lymphocytic and monocytic cells in lymphoid tissue, and by the Paneth cells of the gut. Defects in this gene are associated with chronic obstructive pulmonary disease, emphysema, and chronic liver disease. Several transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Aug 2020]

SERPINA1 Gene-Disease associations (from GenCC):

alpha 1-antitrypsin deficiency
Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Genomics England PanelApp, Orphanet, PanelApp Australia, Labcorp Genetics (formerly Invitae)
hemorrhagic disease due to alpha-1-antitrypsin Pittsburgh mutation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
cystic fibrosis
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

SERPINA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.79).

BP6

Variant 14-94382716-G-A is Benign according to our data. Variant chr14-94382716-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 255788.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.34 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00477 (727/152268) while in subpopulation AFR AF = 0.0167 (693/41546). AF 95% confidence interval is 0.0157. There are 7 homozygotes in GnomAd4. There are 331 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 7 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000295.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SERPINA1	NM_000295.5	MANE Select	c.522C>T	p.Thr174Thr	synonymous	Exon 2 of 5	NP_000286.3
SERPINA1	NM_001002235.3		c.522C>T	p.Thr174Thr	synonymous	Exon 2 of 5	NP_001002235.1	E9KL23
SERPINA1	NM_001002236.3		c.522C>T	p.Thr174Thr	synonymous	Exon 4 of 7	NP_001002236.1	E9KL23

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SERPINA1	ENST00000393087.9	TSL:1 MANE Select	c.522C>T	p.Thr174Thr	synonymous	Exon 2 of 5	ENSP00000376802.4	P01009-1
SERPINA1	ENST00000355814.8	TSL:1	c.522C>T	p.Thr174Thr	synonymous	Exon 2 of 5	ENSP00000348068.4	P01009-1
SERPINA1	ENST00000393088.8	TSL:1	c.522C>T	p.Thr174Thr	synonymous	Exon 4 of 7	ENSP00000376803.4	P01009-1

Frequencies

GnomAD3 genomes

AF:

0.00475

AC:

722

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0166

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00137

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00526

GnomAD2 exomes

AF:

0.00133

AC:

335

AN:

251474

AF XY:

0.00101

show subpopulations

Gnomad AFR exome

AF:

0.0189

Gnomad AMR exome

AF:

0.000723

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000462

AC:

675

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000421

AC XY:

306

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.0166

AC:

555

AN:

33480

American (AMR)

AF:

0.000827

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000153

AC:

AN:

1112010

Other (OTH)

AF:

0.000993

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

146

194

243

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:

0.00477

AC:

727

AN:

152268

Hom.:

Cov.:

AF XY:

0.00445

AC XY:

331

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.0167

AC:

693

AN:

41546

American (AMR)

AF:

0.00137

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68020

Other (OTH)

AF:

0.00521

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

112

149

186

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:

0.00234

Hom.:

Bravo

AF:

0.00529

Asia WGS

AF:

0.00260

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Alpha-1-antitrypsin deficiency (1)

Inborn genetic diseases (1)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.79

CADD

Benign

0.90

(source)

DANN

Benign

0.42

PhyloP100

-2.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Mutation Taster

=100/0

polymorphism

(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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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