21-46399680-A-C

Variant names:

• chr21-46399680-A-C
• NM_006031.6:c.4675A>C
• PCNT p.Met1559Leu

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.4675A>C​(p.Met1559Leu) 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 benign outcome for this variant. 17/22 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 Likely benign in ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PCNT NM_006031.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.552
• 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: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, G2P, 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=0.063072294).

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.4675A>C	p.Met1559Leu	missense	Exon 25 of 47	NP_006022.3
	PCNT	NM_001315529.2		c.4321A>C	p.Met1441Leu	missense	Exon 25 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.4675A>C	p.Met1559Leu	missense	Exon 25 of 47	ENSP00000352572.5	O95613-1
	PCNT	ENST00000480896.5	TSL:1	c.4321A>C	p.Met1441Leu	missense	Exon 25 of 47	ENSP00000511989.1	O95613-2
	PCNT	ENST00000695558.1		c.4708A>C	p.Met1570Leu	missense	Exon 26 of 48	ENSP00000512015.1	A0A8Q3SHZ3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	14
DANN	Benign	0.48
DEOGEN2	Benign	0.035	T
Eigen	Benign	-0.79
Eigen_PC	Benign	-0.77
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.56	T
M_CAP	Benign	0.0086	T
MetaRNN	Benign	0.063	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L
PhyloP100		0.55
PrimateAI	Benign	0.26	T
PROVEAN	Benign	-0.020	N
REVEL	Benign	0.12
Sift	Benign	0.35	T
Sift4G	Benign	0.35	T
Varity_R		0.084
gMVP		0.043
Mutation Taster		=94/6	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr21-47819594;