21-46363870-G-T

Variant names:

• chr21-46363870-G-T
• rs776223654
• NM_006031.6:c.2545G>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.2545G>T​(p.Gly849Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,080 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. 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. G849R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PCNT NM_006031.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.210
• Publications: 1 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: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, G2P, Orphanet
• 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=0.03687641).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCNT	NM_006031.6	MANE Select	c.2545G>T	p.Gly849Trp	missense	Exon 14 of 47	NP_006022.3
	PCNT	NM_001315529.2		c.2191G>T	p.Gly731Trp	missense	Exon 14 of 47	NP_001302458.1	O95613-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PCNT	ENST00000359568.10	TSL:1 MANE Select	c.2545G>T	p.Gly849Trp	missense	Exon 14 of 47	ENSP00000352572.5	O95613-1
	PCNT	ENST00000480896.5	TSL:1	c.2191G>T	p.Gly731Trp	missense	Exon 14 of 47	ENSP00000511989.1	O95613-2
	PCNT	ENST00000695558.1		c.2545G>T	p.Gly849Trp	missense	Exon 14 of 48	ENSP00000512015.1	A0A8Q3SHZ3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000404 AC: 1 AN: 247240 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460080 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 726332

African (AFR) AF: 0.00 AC: 0 AN: 33458

American (AMR) AF: 0.0000224 AC: 1 AN: 44682

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26080

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5738

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111456

Other (OTH) AF: 0.00 AC: 0 AN: 60352

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Microcephalic osteodysplastic primordial dwarfism type II (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.69
CADD	Benign	3.8
DANN	Benign	0.45
DEOGEN2	Benign	0.014	T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.016	N
LIST_S2	Benign	0.39	T
M_CAP	Benign	0.0059	T
MetaRNN	Benign	0.037	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.42	N
PhyloP100		-0.21
PrimateAI	Benign	0.22	T
PROVEAN	Benign	1.6	N
REVEL	Benign	0.020
Sift	Benign	0.14	T
Sift4G	Benign	0.079	T
Polyphen		0.0080	B
Vest4		0.16
MutPred		0.26		Loss of disorder (P = 0.0136)
MVP		0.20
MPC		0.49
ClinPred		0.081	T
GERP RS		-4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.031
gMVP		0.070
Mutation Taster		=97/3	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: rs776223654; hg19: chr21-47783785;