chr20-49072437-A-G

Position:

• chr20-49072437-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001316.4(CSE1L):​c.920A>G​(p.Glu307Gly) variant causes a missense change involving the alteration of a 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: 33)
• Consequence: CSE1L NM_001316.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.49

Genes affected

CSE1L (HGNC:2431): (chromosome segregation 1 like) Proteins that carry a nuclear localization signal (NLS) are transported into the nucleus by the importin-alpha/beta heterodimer. Importin-alpha binds the NLS, while importin-beta mediates translocation through the nuclear pore complex. After translocation, RanGTP binds importin-beta and displaces importin-alpha. Importin-alpha must then be returned to the cytoplasm, leaving the NLS protein behind. The protein encoded by this gene binds strongly to NLS-free importin-alpha, and this binding is released in the cytoplasm by the combined action of RANBP1 and RANGAP1. In addition, the encoded protein may play a role both in apoptosis and in cell proliferation. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, CSE1L
• BP4: Computational evidence support a benign effect (MetaRNN=0.40114096).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CSE1L	NM_001316.4	c.920A>G	p.Glu307Gly	missense_variant	9/25	ENST00000262982.3
CSE1L	NM_001362762.2	c.920A>G	p.Glu307Gly	missense_variant	9/25
CSE1L	NM_001256135.2	c.769-131A>G		intron_variant
CSE1L	NR_045796.2	n.558A>G		non_coding_transcript_exon_variant	6/22

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CSE1L	ENST00000262982.3	c.920A>G	p.Glu307Gly	missense_variant	9/25	1	NM_001316.4	P1
CSE1L	ENST00000396192.7	c.769-131A>G		intron_variant		5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

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

Dec 14, 2021

The c.920A>G (p.E307G) alteration is located in exon 9 (coding exon 8) of the CSE1L gene. This alteration results from a A to G substitution at nucleotide position 920, causing the glutamic acid (E) at amino acid position 307 to be replaced by a glycine (G). 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	0.28
BayesDel_addAF	Uncertain	0.069	T
BayesDel_noAF	Benign	-0.14
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.64	D
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.030	D
MetaRNN	Benign	0.40	T
MetaSVM	Benign	-0.70	T
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-4.1	D
REVEL	Uncertain	0.32
Sift	Uncertain	0.027	D
Sift4G	Benign	0.17	T
Polyphen		0.83	P
Vest4		0.44
MutPred		0.48		Loss of solvent accessibility (P = 0.0111);
MVP		0.17
MPC		0.53
ClinPred		0.98	D
GERP RS		5.5
Varity_R		0.45
gMVP		0.52

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: chr20-47688974;