12-6445117-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001242.5(CD27):c.22T>C(p.Trp8Arg) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. W8G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: CD27 NM_001242.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.42

Genes affected

CD27 (HGNC:11922): (CD27 molecule) The protein encoded by this gene is a member of the TNF-receptor superfamily. This receptor is required for generation and long-term maintenance of T cell immunity. It binds to ligand CD70, and plays a key role in regulating B-cell activation and immunoglobulin synthesis. This receptor transduces signals that lead to the activation of NF-kappaB and MAPK8/JNK. Adaptor proteins TRAF2 and TRAF5 have been shown to mediate the signaling process of this receptor. CD27-binding protein (SIVA), a proapoptotic protein, can bind to this receptor and is thought to play an important role in the apoptosis induced by this receptor. [provided by RefSeq, Jul 2008]

CD27-AS1 (HGNC:43896): (CD27 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.841

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD27	NM_001242.5	c.22T>C	p.Trp8Arg	missense_variant	1/6	ENST00000266557.4
CD27-AS1	NR_015382.2	n.1517-1400A>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD27	ENST00000266557.4	c.22T>C	p.Trp8Arg	missense_variant	1/6	1	NM_001242.5	P1
CD27-AS1	ENST00000689782.1	n.460-1400A>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Lymphoproliferative syndrome 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 29, 2019

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with CD27-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces tryptophan with arginine at codon 8 of the CD27 protein (p.Trp8Arg). The tryptophan residue is highly conserved and there is a moderate physicochemical difference between tryptophan and arginine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.24
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.74	D
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.36	T
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Pathogenic	0.87	D
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	0.90	D
PrimateAI	Benign	0.48	T
PROVEAN	Uncertain	-4.3	D
REVEL	Pathogenic	0.68
Sift	Uncertain	0.0050	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.68
MutPred		0.60		Gain of catalytic residue at W8 (P = 0.0134);
MVP		1.0
MPC		0.97
ClinPred		0.97	D
GERP RS		4.9
Varity_R		0.39
gMVP		0.64

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: rs1949394416; hg19: chr12-6554283;