5-34929844-G-A

Variant names:

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001012339.3(DNAJC21):c.25G>A(p.Gly9Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000026 in 1,576,548 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. G9G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000040 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

DNAJC21
NM_001012339.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 3.98

Publications

2 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: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.963

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAJC21	NM_001012339.3 link	c.25G>A	p.Gly9Arg	missense_variant	Exon 1 of 12	ENST00000648817.1	NP_001012339.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAJC21	ENST00000648817.1 link	c.25G>A	p.Gly9Arg	missense_variant	Exon 1 of 12		NM_001012339.3	ENSP00000497410.1		Q5F1R6-1

Frequencies

GnomAD3 genomes

AF:

0.0000397

AC:

AN:

151130

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:

0.0000739

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000465

AC:

AN:

214834

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000103

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000246

AC:

AN:

1425418

Hom.:

Cov.:

AF XY:

0.0000226

AC XY:

AN XY:

709124

show subpopulations

African (AFR)

AF:

0.0000333

AC:

AN:

30054

American (AMR)

AF:

0.00

AC:

AN:

41628

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25030

East Asian (EAS)

AF:

0.00

AC:

AN:

35322

South Asian (SAS)

AF:

0.00

AC:

AN:

82996

European-Finnish (FIN)

AF:

0.0000193

AC:

AN:

51772

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5358

European-Non Finnish (NFE)

AF:

0.0000301

AC:

AN:

1094690

Other (OTH)

AF:

0.00

AC:

AN:

58568

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000397

AC:

AN:

151130

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73792

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41292

American (AMR)

AF:

0.00

AC:

AN:

15204

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5118

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10266

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000739

AC:

AN:

67664

Other (OTH)

AF:

0.00

AC:

AN:

2070

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000302

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 04, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.25G>A (p.G9R) alteration is located in exon 1 (coding exon 1) of the DNAJC21 gene. This alteration results from a G to A substitution at nucleotide position 25, causing the glycine (G) at amino acid position 9 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Mar 13, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 9 of the DNAJC21 protein (p.Gly9Arg). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with DNAJC21-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.90

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Uncertain

0.040

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.43

T;T;.;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Benign

0.56

LIST_S2

Pathogenic

0.98

.;D;D;D

M_CAP

Pathogenic

0.66

MetaRNN

Pathogenic

0.96

D;D;D;D

MetaSVM

Uncertain

0.41

MutationAssessor

Pathogenic

2.9

M;M;M;M

PhyloP100

4.0

PrimateAI

Pathogenic

0.92

PROVEAN

Pathogenic

-4.8

.;D;D;.

REVEL

Pathogenic

0.78

Sift

Uncertain

0.022

.;D;D;.

Sift4G

Uncertain

0.019

.;D;D;.

Polyphen

1.0

D;D;D;.

Vest4

0.44, 0.49

MutPred

0.85

Gain of MoRF binding (P = 4e-04);Gain of MoRF binding (P = 4e-04);Gain of MoRF binding (P = 4e-04);Gain of MoRF binding (P = 4e-04);

MVP

0.91

MPC

0.34

ClinPred

0.99

GERP RS

3.1

PromoterAI

0.035

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.63

gMVP

0.59

Mutation Taster

=46/54

disease causing

(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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5-34929844-G-A

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