16-71860490-C-T

Variant names:

• chr16-71860490-C-T
• rs1026618798
• NM_001201552.2:c.767G>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001201552.2(ZNF821):​c.767G>A​(p.Arg256His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: ZNF821 NM_001201552.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.33

Genes affected

ZNF821 (HGNC:28043): (zinc finger protein 821) This gene encodes a protein with two C2H2 zinc finger motifs and a score-and-three (23)-amino acid peptide repeat (STPR) domain. The STPR domain of the encoded protein binds to double stranded DNA and may also contain a nuclear localization signal, suggesting that this protein interacts with chromosomal DNA. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jan 2011]

IST1 (HGNC:28977): (IST1 factor associated with ESCRT-III) This gene encodes a protein with MIT-interacting motifs that interacts with components of endosomal sorting complexes required for transport (ESCRT). ESCRT functions in vesicle budding, such as that which occurs during membrane abscission in cytokinesis. There is a pseudogene for this gene on chromosome 19. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Aug 2012]

ENSG00000279592 (HGNC:):

ATXN1L (HGNC:33279): (ataxin 1 like) Predicted to enable DNA binding activity and RNA binding activity. Predicted to be involved in several processes, including learning or memory; regulation of transcription, DNA-templated; and social behavior. Predicted to act upstream of or within several processes, including lung alveolus development; negative regulation of transcription by RNA polymerase II; and positive regulation of hematopoietic stem cell proliferation. Located in nucleolus and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZNF821	NM_001201552.2	c.767G>A	p.Arg256His	missense_variant	Exon 8 of 8	ENST00000425432.6	NP_001188481.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZNF821	ENST00000425432.6	c.767G>A	p.Arg256His	missense_variant	Exon 8 of 8	5	NM_001201552.2	ENSP00000398089.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461884 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.767G>A (p.R256H) alteration is located in exon 8 (coding exon 6) of the ZNF821 gene. This alteration results from a G to A substitution at nucleotide position 767, causing the arginine (R) at amino acid position 256 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Uncertain	0.041	T
BayesDel_noAF	Benign	-0.18
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.085	.;T;.;T;.;.
Eigen	Uncertain	0.66
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D;D;.;.;D;D
M_CAP	Benign	0.024	T
MetaRNN	Uncertain	0.59	D;D;D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.0	.;L;.;L;.;.
PrimateAI	Uncertain	0.74	T
PROVEAN	Uncertain	-2.4	N;N;N;N;N;D
REVEL	Uncertain	0.31
Sift	Uncertain	0.0010	D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;T;D;T;.;.
Polyphen		1.0	.;D;.;D;.;.
Vest4		0.81
MVP		0.13
MPC		2.2
ClinPred		0.96	D
GERP RS		4.7
Varity_R		0.46
gMVP		0.74

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1026618798; hg19: chr16-71894393; COSMIC: COSV57987991; COSMIC: COSV57987991;