19-29708345-C-T

Variant names:

Variant summary

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

The NM_031448.6(C19orf12):c.69G>A(p.Ala23Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00633 in 1,614,144 control chromosomes in the GnomAD database, including 50 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0040 ( 3 hom., cov: 32)

Exomes 𝑓: 0.0066 ( 47 hom. )

Consequence

C19orf12
NM_031448.6 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: -2.70

Publications

4 publications found

Variant links:

Genes affected

C19orf12 (HGNC:25443): (chromosome 19 open reading frame 12) This gene encodes a small transmembrane protein. Mutations in this gene are a cause of neurodegeneration with brain iron accumulation-4 (NBIA4), but the specific function of the encoded protein is unknown. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

C19orf12 Gene-Disease associations (from GenCC):

neurodegeneration with brain iron accumulation 4
Inheritance: AR, SD, AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Genomics England PanelApp, Illumina, Ambry Genetics, G2P
hereditary spastic paraplegia 43
Inheritance: AR Classification: LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics

C19orf12 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=-0.78).

BP6

Variant 19-29708345-C-T is Benign according to our data. Variant chr19-29708345-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 238219.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.7 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.004 (610/152336) while in subpopulation NFE AF = 0.00723 (492/68032). AF 95% confidence interval is 0.0067. There are 3 homozygotes in GnomAd4. There are 272 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 AR,SD,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
C19orf12	NM_031448.6 link	c.69G>A	p.Ala23Ala	synonymous_variant	Exon 2 of 3	ENST00000323670.14	NP_113636.2	Q9NSK7-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
C19orf12	ENST00000323670.14 link	c.69G>A	p.Ala23Ala	synonymous_variant	Exon 2 of 3	2	NM_031448.6	ENSP00000313332.9		Q9NSK7-4

Frequencies

GnomAD3 genomes

AF:

0.00401

AC:

610

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00164

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00177

Gnomad ASJ

AF:

0.00346

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00723

Gnomad OTH

AF:

0.00334

GnomAD2 exomes

AF:

0.00360

AC:

899

AN:

249498

AF XY:

0.00385

show subpopulations

Gnomad AFR exome

AF:

0.00174

Gnomad AMR exome

AF:

0.00110

Gnomad ASJ exome

AF:

0.00417

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000279

Gnomad NFE exome

AF:

0.00652

Gnomad OTH exome

AF:

0.00330

GnomAD4 exome

AF:

0.00658

AC:

9613

AN:

1461808

Hom.:

Cov.:

AF XY:

0.00636

AC XY:

4624

AN XY:

727204

show subpopulations

African (AFR)

AF:

0.00122

AC:

AN:

33480

American (AMR)

AF:

0.00105

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00371

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00112

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.000712

AC:

AN:

53354

Middle Eastern (MID)

AF:

0.00503

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00803

AC:

8928

AN:

1111992

Other (OTH)

AF:

0.00556

AC:

336

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

576

1152

1729

2305

2881

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

362

724

1086

1448

1810

<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:

0.00400

AC:

610

AN:

152336

Hom.:

Cov.:

AF XY:

0.00365

AC XY:

272

AN XY:

74496

show subpopulations

African (AFR)

AF:

0.00164

AC:

AN:

41578

American (AMR)

AF:

0.00177

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00346

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.000414

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.000188

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00723

AC:

492

AN:

68032

Other (OTH)

AF:

0.00331

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

113

141

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:

0.00535

Hom.:

Bravo

AF:

0.00405

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00796

EpiControl

AF:

0.00830

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Neurodegeneration with brain iron accumulation 4

Benign:4

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Sep 21, 2016

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jun 28, 2017

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Apr 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

C19orf12: BP4, BP7, BS2 -

Sep 27, 2019

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:2

Jun 30, 2016

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Hereditary spastic paraplegia 43

Benign:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary spastic paraplegia

Benign:1

Oct 15, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

0.87

(source)

DANN

Benign

0.42

PhyloP100

-2.7

PromoterAI

-0.019

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Mutation Taster

=99/1

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over