5-34929917-G-T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate

The NM_001012339.3(DNAJC21):c.97+1G>T variant causes a splice donor, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000572 in 1,574,014 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 29)

Exomes 𝑓: 0.0000049 ( 0 hom. )

Consequence

DNAJC21
NM_001012339.3 splice_donor, intron

Scores

Splicing: ADA: 1.000

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 1.27

Publications

0 publications found

Variant links:

Genes affected

DNAJC21 (HGNC:27030): (DnaJ heat shock protein family (Hsp40) member C21) This gene encodes a member of the DNAJ heat shock protein 40 family of proteins that is characterized by two N-terminal tetratricopeptide repeat domains and a C-terminal DNAJ domain. This protein binds the precursor 45S ribosomal RNA and may be involved in early nuclear ribosomal RNA biogenesis and maturation of the 60S ribosomal subunit. Mutations in this gene result in Bone marrow failure syndrome 3. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Feb 2017]

DNAJC21 Gene-Disease associations (from GenCC):

bone marrow failure syndrome 3
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
Shwachman-Diamond syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

DNAJC21 links:

LOC124900961 (HGNC:):

LOC124900961 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PVS1

Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 5-34929917-G-T is Pathogenic according to our data. Variant chr5-34929917-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2806396.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAJC21	NM_001012339.3 link	c.97+1G>T		splice_donor_variant, intron_variant	Intron 1 of 11	ENST00000648817.1	NP_001012339.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAJC21	ENST00000648817.1 link	c.97+1G>T		splice_donor_variant, intron_variant	Intron 1 of 11		NM_001012339.3	ENSP00000497410.1		Q5F1R6-1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151928

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000492

AC:

AN:

1422086

Hom.:

Cov.:

AF XY:

0.00000707

AC XY:

AN XY:

707106

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30234

American (AMR)

AF:

0.00

AC:

AN:

41328

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24984

East Asian (EAS)

AF:

0.00

AC:

AN:

35412

South Asian (SAS)

AF:

0.00

AC:

AN:

82292

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51486

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5584

European-Non Finnish (NFE)

AF:

0.00000641

AC:

AN:

1092252

Other (OTH)

AF:

0.00

AC:

AN:

58514

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151928

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74200

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41390

American (AMR)

AF:

0.00

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5140

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10574

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67940

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Mar 24, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant has not been reported in the literature in individuals affected with DNAJC21-related conditions. This sequence change affects a donor splice site in intron 1 of the DNAJC21 gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in DNAJC21 are known to be pathogenic (PMID: 27346687, 28062395). This variant is not present in population databases (gnomAD no frequency). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Benign

-0.31

CADD

Pathogenic

(source)

DANN

Benign

0.92

Eigen

Uncertain

0.46

Eigen_PC

Benign

0.16

FATHMM_MKL

Benign

0.68

PhyloP100

1.3

GERP RS

0.69

PromoterAI

-0.50

Under-expression

(source)

Mutation Taster

=14/86

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.83

SpliceAI score (max)

1.0

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.86

Position offset: -2

DS_DL_spliceai

1.0

Position offset: -1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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5-34929917-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over