21-46432086-A-T

Variant names:

• chr21-46432086-A-T
• rs774517427
• NM_006031.6:c.8622A>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_006031.6(PCNT):​c.8622A>T​(p.Glu2874Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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 nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Synonymous variant affecting the same amino acid position (i.e. E2874E) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PCNT NM_006031.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0400
• Publications: 0 publications found

Genes affected

PCNT (HGNC:16068): (pericentrin) The protein encoded by this gene binds to calmodulin and is expressed in the centrosome. It is an integral component of the pericentriolar material (PCM). The protein contains a series of coiled-coil domains and a highly conserved PCM targeting motif called the PACT domain near its C-terminus. The protein interacts with the microtubule nucleation component gamma-tubulin and is likely important to normal functioning of the centrosomes, cytoskeleton, and cell-cycle progression. Mutations in this gene cause Seckel syndrome-4 and microcephalic osteodysplastic primordial dwarfism type II. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

PCNT Gene-Disease associations (from GenCC):

• microcephalic osteodysplastic primordial dwarfism type II

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Moyamoya disease

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05549988).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006031.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCNT	NM_006031.6	MANE Select	c.8622A>T	p.Glu2874Asp	missense	Exon 38 of 47	NP_006022.3
	PCNT	NM_001315529.2		c.8160+108A>T		intron	N/A	NP_001302458.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCNT	ENST00000359568.10	TSL:1 MANE Select	c.8622A>T	p.Glu2874Asp	missense	Exon 38 of 47	ENSP00000352572.5
	PCNT	ENST00000480896.5	TSL:1	c.8160+108A>T		intron	N/A	ENSP00000511989.1
	PCNT	ENST00000695558.1		c.8655A>T	p.Glu2885Asp	missense	Exon 39 of 48	ENSP00000512015.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461790 Hom.: 0 Cov.: 37 AF XY: 0.00000138 AC XY: 1 AN XY: 727190

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53322

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.70
CADD	Benign	9.9
DANN	Benign	0.90
DEOGEN2	Benign	0.036	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.15	N
LIST_S2	Benign	0.37	T
M_CAP	Benign	0.0074	T
MetaRNN	Benign	0.055	T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	1.2	L
PhyloP100		-0.040
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.50	N
REVEL	Benign	0.028
Sift	Benign	0.48	T
Sift4G	Benign	0.56	T
Polyphen		0.13	B
Vest4		0.19
MutPred		0.15		Gain of MoRF binding (P = 0.0898)
MVP		0.28
MPC		0.27
ClinPred		0.052	T
GERP RS		-4.3
Varity_R		0.027
gMVP		0.11
Mutation Taster		=90/10	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: rs774517427; hg19: chr21-47852000;