12-53270756-G-T

Variant summary

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

The NM_012291.5(ESPL1):c.1327G>T(p.Gly443Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: ESPL1 NM_012291.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.92

Genes affected

ESPL1 (HGNC:16856): (extra spindle pole bodies like 1, separase) Stable cohesion between sister chromatids before anaphase and their timely separation during anaphase are critical for chromosome inheritance. In vertebrates, sister chromatid cohesion is released in 2 steps via distinct mechanisms. The first step involves phosphorylation of STAG1 (MIM 604358) or STAG2 (MIM 300826) in the cohesin complex. The second step involves cleavage of the cohesin subunit SCC1 (RAD21; MIM 606462) by ESPL1, or separase, which initiates the final separation of sister chromatids (Sun et al., 2009 [PubMed 19345191]).[supplied by OMIM, Nov 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, ESPL1
• BP4: Computational evidence support a benign effect (MetaRNN=0.24770993).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ESPL1	NM_012291.5	c.1327G>T	p.Gly443Cys	missense_variant	5/31	ENST00000257934.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ESPL1	ENST00000257934.9	c.1327G>T	p.Gly443Cys	missense_variant	5/31	5	NM_012291.5	P1
ESPL1	ENST00000552671.5	c.*1258G>T		3_prime_UTR_variant, NMD_transcript_variant	5/31	2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

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

Aug 30, 2022

The c.1327G>T (p.G443C) alteration is located in exon 5 (coding exon 4) of the ESPL1 gene. This alteration results from a G to T substitution at nucleotide position 1327, causing the glycine (G) at amino acid position 443 to be replaced by a cysteine (C). 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	0.15
BayesDel_addAF	Benign	-0.093	T
BayesDel_noAF	Benign	-0.37
Cadd	Benign	23
Dann	Uncertain	1.0
DEOGEN2	Benign	0.22	T;T
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.72	T;.
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.25	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.4	M;M
MutationTaster	Benign	0.85	D;D
PrimateAI	Benign	0.33	T
PROVEAN	Uncertain	-2.8	D;D
REVEL	Benign	0.13
Sift	Uncertain	0.0030	D;D
Sift4G	Uncertain	0.0050	D;D
Polyphen		0.98	D;D
Vest4		0.39
MutPred		0.47		Gain of catalytic residue at L444 (P = 0.0021);Gain of catalytic residue at L444 (P = 0.0021);
MVP		0.41
MPC		1.6
ClinPred		0.97	D
GERP RS		3.0
Varity_R		0.32
gMVP		0.24

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-53664540;