chr1-43386034-G-A

Position:

• chr1-43386034-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_201542.5(MED8):​c.686C>T​(p.Pro229Leu) 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P229S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MED8 NM_201542.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.96

Genes affected

MED8 (HGNC:19971): (mediator complex subunit 8) This gene encodes a protein component of the mediator complex, which aids in transcriptional activation through interaction with RNA polymerase II and gene-specific transcription factors. The encoded protein may also function in ubiquitin ligation and protein degradation. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jan 2013]

MED8 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23770702).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MED8	NM_201542.5	c.686C>T	p.Pro229Leu	missense_variant	6/7	ENST00000372457.9	NP_963836.2
MED8	NM_052877.5	c.686C>T	p.Pro229Leu	missense_variant	6/8		NP_443109.2
MED8	NM_001001653.3	c.419C>T	p.Pro140Leu	missense_variant	6/7		NP_001001653.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MED8	ENST00000372457.9	c.686C>T	p.Pro229Leu	missense_variant	6/7	2	NM_201542.5	ENSP00000361535.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

May 11, 2022

The c.686C>T (p.P229L) alteration is located in exon 6 (coding exon 6) of the MED8 gene. This alteration results from a C to T substitution at nucleotide position 686, causing the proline (P) at amino acid position 229 to be replaced by a leucine (L). 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	0.12
BayesDel_addAF	Uncertain	0.066	T
BayesDel_noAF	Benign	-0.14
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.087	.;T;.
Eigen	Benign	0.17
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.92	D;D;D
M_CAP	Benign	0.0047	T
MetaRNN	Benign	0.24	T;T;T
MetaSVM	Benign	-0.91	T
MutationAssessor	Uncertain	2.5	M;M;.
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-1.6	N;N;N
REVEL	Benign	0.13
Sift	Benign	0.11	T;D;D
Sift4G	Benign	0.23	T;T;T
Polyphen		0.49	P;B;.
Vest4		0.43
MutPred		0.37		Loss of glycosylation at P229 (P = 0.02);Loss of glycosylation at P229 (P = 0.02);.;
MVP		0.61
MPC		0.32
ClinPred		0.90	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.15
gMVP		0.28

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.12		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: chr1-43851705;