chr8-116847544-T-C

Position:

• chr8-116847544-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_006265.3(RAD21):​c.1852A>G​(p.Ser618Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,626 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: RAD21 NM_006265.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 5.14

Genes affected

RAD21 (HGNC:9811): (RAD21 cohesin complex component) The protein encoded by this gene is highly similar to the gene product of Schizosaccharomyces pombe rad21, a gene involved in the repair of DNA double-strand breaks, as well as in chromatid cohesion during mitosis. This protein is a nuclear phospho-protein, which becomes hyperphosphorylated in cell cycle M phase. The highly regulated association of this protein with mitotic chromatin specifically at the centromere region suggests its role in sister chromatid cohesion in mitotic cells. [provided by RefSeq, Jul 2008]

LOC112268030 (HGNC:):

UTP23 (HGNC:28224): (UTP23 small subunit processome component) Enables mRNA 3'-UTR binding activity and mRNA 5'-UTR binding activity. Predicted to be involved in rRNA processing. Predicted to act upstream of or within endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA). Predicted to be part of small-subunit processome. Predicted to be active in nucleolus. Implicated in colorectal adenocarcinoma. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), RAD21. . Gene score misZ 2.6421 (greater than the threshold 3.09). Trascript score misZ 3.6451 (greater than threshold 3.09). GenCC has associacion of gene with Cornelia de Lange syndrome, Cornelia de Lange syndrome 4, Mungan syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.2553022).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAD21	NM_006265.3	c.1852A>G	p.Ser618Gly	missense_variant	14/14	ENST00000297338.7
LOC112268030	XR_002956724.2	n.761-1344T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAD21	ENST00000297338.7	c.1852A>G	p.Ser618Gly	missense_variant	14/14	1	NM_006265.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461626 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727120

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Dec 12, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Cornelia de Lange syndrome 4 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing;provider interpretation

Geisinger Autism and Developmental Medicine Institute, Geisinger Health System

Oct 26, 2017

This 13 year old male has a history of autism spectrum disorder, ADHD, myopia, sleep issues, anxiety, and epistaxis. The c.1852A>G variant was inherited from this patient's father. The variant has not been reported in population databases (ExAC and gnomAD). A different missense variant at the same amino acid residue has been reported in one individual from the Latino population (frequency of 0.0029%). Computional models are inconsistent. The patient's father does not have a history of neurodevelopmental concerns. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.085
BayesDel_addAF	Benign	0.0078	T
BayesDel_noAF	Benign	-0.23
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.22	T;.;.;T
Eigen	Benign	-0.37
Eigen_PC	Benign	-0.12
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.82	T;T;D;T
M_CAP	Benign	0.048	D
MetaRNN	Benign	0.26	T;T;T;T
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	0.015	N;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-0.46	N;N;N;N
REVEL	Benign	0.23
Sift	Uncertain	0.016	D;T;T;T
Sift4G	Benign	0.28	T;T;T;T
Polyphen		0.0040	B;.;.;.
Vest4		0.27
MutPred		0.46		Loss of glycosylation at S618 (P = 0.0259);.;.;.;
MVP		0.65
MPC		1.1
ClinPred		0.44	T
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.34
gMVP		0.69

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

LitVar

Other links and lift over

dbSNP: rs1554610467; hg19: chr8-117859783;