chr5-34929917-G-C

Variant names:

• chr5-34929917-G-C
• rs1764526690
• NM_001012339.3:c.97+1G>C

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001012339.3(DNAJC21):​c.97+1G>C variant causes a splice donor, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: not found (cov: 29)
• 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

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: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
• Shwachman-Diamond syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LOC124900961 (HGNC:):

ACMG classification

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-C is Pathogenic according to our data. Variant chr5-34929917-G-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1349241.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001012339.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNAJC21	NM_001012339.3	MANE Select	c.97+1G>C		splice_donor intron	N/A	NP_001012339.2	Q5F1R6-1
	DNAJC21	NM_194283.4		c.97+1G>C		splice_donor intron	N/A	NP_919259.3	Q5F1R6-2
	DNAJC21	NM_001348420.2		c.97+1G>C		splice_donor intron	N/A	NP_001335349.1	Q5F1R6-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNAJC21	ENST00000648817.1	MANE Select	c.97+1G>C		splice_donor intron	N/A	ENSP00000497410.1	Q5F1R6-1
	DNAJC21	ENST00000966889.1		c.97+1G>C		splice_donor intron	N/A	ENSP00000636948.1
	DNAJC21	ENST00000382021.2	TSL:2	c.97+1G>C		splice_donor intron	N/A	ENSP00000371451.2	Q5F1R6-2

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 29

ClinVar

ClinVar submissions as Germline

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Benign	-0.31
CADD	Pathogenic	29
DANN	Benign	0.90
Eigen	Uncertain	0.46
Eigen_PC	Benign	0.16
FATHMM_MKL	Benign	0.69	D
PhyloP100		1.3
GERP RS		0.69
PromoterAI		-0.51	Under-expression
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
Mutation Taster		=14/86	disease causing

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		0.39		Position offset: 3
DS_DL_spliceai		1.0		Position offset: -1

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

Other links and lift over

dbSNP: rs1764526690; hg19: chr5-34930022;