chr5-42807008-G-T

Variant names:

• chr5-42807008-G-T
• rs753869487
• NM_005410.4:c.304C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005410.4(SELENOP):​c.304C>A​(p.His102Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000693 in 1,443,152 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H102D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SELENOP NM_005410.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.167
• Publications: 0 publications found

Genes affected

SELENOP (HGNC:10751): (selenoprotein P) This gene encodes a selenoprotein that is predominantly expressed in the liver and secreted into the plasma. This selenoprotein is unique in that it contains multiple selenocysteine (Sec) residues per polypeptide (10 in human), and accounts for most of the selenium in plasma. It has been implicated as an extracellular antioxidant, and in the transport of selenium to extra-hepatic tissues via apolipoprotein E receptor-2 (apoER2). Mice lacking this gene exhibit neurological dysfunction, suggesting its importance in normal brain function. Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. The mRNA for this selenoprotein contains two SECIS elements. The use of alternative polyadenylation sites, one located in between the two SECIS elements, results in two populations of mRNAs containing either both (predominant) or just the upstream SECIS element (PMID:27881738). Alternatively spliced transcript variants have also been found for this gene. [provided by RefSeq, Oct 2018]

ENSG00000272234 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26180422).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005410.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SELENOP	NM_005410.4	MANE Select	c.304C>A	p.His102Asn	missense	Exon 3 of 5	NP_005401.3
	SELENOP	NM_001093726.3		c.394C>A	p.His132Asn	missense	Exon 4 of 6	NP_001087195.1
	SELENOP	NM_001085486.3		c.304C>A	p.His102Asn	missense	Exon 4 of 6	NP_001078955.1	P49908

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SELENOP	ENST00000514985.6	TSL:1 MANE Select	c.304C>A	p.His102Asn	missense	Exon 3 of 5	ENSP00000420939.1	P49908
	SELENOP	ENST00000506577.5	TSL:1	c.304C>A	p.His102Asn	missense	Exon 3 of 5	ENSP00000425915.1	P49908
	SELENOP	ENST00000511224.5	TSL:1	c.304C>A	p.His102Asn	missense	Exon 4 of 6	ENSP00000427671.1	P49908

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.93e-7 AC: 1 AN: 1443152 Hom.: 0 Cov.: 26 AF XY: 0.00 AC XY: 0 AN XY: 719080

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33076

American (AMR) AF: 0.00 AC: 0 AN: 44666

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25946

East Asian (EAS) AF: 0.00 AC: 0 AN: 39430

South Asian (SAS) AF: 0.00 AC: 0 AN: 85730

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53306

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5542

European-Non Finnish (NFE) AF: 9.13e-7 AC: 1 AN: 1095738

Other (OTH) AF: 0.00 AC: 0 AN: 59718

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	6.4
DANN	Benign	0.78
DEOGEN2	Benign	0.058	T
Eigen	Benign	-0.43
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.32	T
MetaRNN	Benign	0.26	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L
PhyloP100		0.17
PrimateAI	Benign	0.37	T
PROVEAN	Benign	-1.5	N
REVEL	Benign	0.047
Sift	Benign	0.19	T
Sift4G	Benign	0.31	T
MutPred		0.47		Gain of MoRF binding (P = 0.1048)
MVP		0.072
MPC		0.095
ClinPred		0.039	T
GERP RS		1.6
Varity_R		0.063
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs753869487; hg19: chr5-42807110;