16-71867945-T-C

Position:

• chr16-71867945-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001201552.2(ZNF821):​c.133A>G​(p.Ile45Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000977 in 1,535,932 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: ZNF821 NM_001201552.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.58

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]

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09738463).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ZNF821	NM_001201552.2	c.133A>G	p.Ile45Val	missense_variant	4/8	ENST00000425432.6	NP_001188481.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ZNF821	ENST00000425432.6	c.133A>G	p.Ile45Val	missense_variant	4/8	5	NM_001201552.2	ENSP00000398089	P4

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152194 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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: 0.0000101 AC: 14 AN: 1383738 Hom.: 0 Cov.: 30 AF XY: 0.0000117 AC XY: 8 AN XY: 682802

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000252

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000111

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152194 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74352

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000224 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2023

The c.133A>G (p.I45V) alteration is located in exon 4 (coding exon 2) of the ZNF821 gene. This alteration results from a A to G substitution at nucleotide position 133, causing the isoleucine (I) at amino acid position 45 to be replaced by a valine (V). 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	0.072
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	19
DANN	Benign	0.91
DEOGEN2	Benign	0.029	.;T;.;T;.;.;.
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.11
FATHMM_MKL	Benign	0.65	D
LIST_S2	Benign	0.64	T;T;T;.;T;.;T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.097	T;T;T;T;T;T;T
MetaSVM	Benign	-0.71	T
MutationAssessor	Benign	0.34	.;N;.;N;.;.;.
MutationTaster	Benign	1.0	D;D;N;N;N
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.020	.;N;N;N;N;N;N
REVEL	Benign	0.23
Sift	Uncertain	0.023	.;D;T;D;D;T;T
Sift4G	Benign	0.84	T;T;T;T;.;.;.
Vest4		0.27
MutPred		0.23		Gain of phosphorylation at S40 (P = 0.2093);Gain of phosphorylation at S40 (P = 0.2093);Gain of phosphorylation at S40 (P = 0.2093);Gain of phosphorylation at S40 (P = 0.2093);Gain of phosphorylation at S40 (P = 0.2093);Gain of phosphorylation at S40 (P = 0.2093);Gain of phosphorylation at S40 (P = 0.2093);
MVP		0.014
MPC		0.73
ClinPred		0.12	T
GERP RS		4.9
Varity_R		0.057
gMVP		0.063

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: rs970968162; hg19: chr16-71901848;