chr12-42355163-T-G

Variant names:

• chr12-42355163-T-G
• NM_201439.2:c.240T>G
• PPHLN1 p.Asp80Glu

Variant summary

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

The NM_201439.2(PPHLN1):​c.240T>G​(p.Asp80Glu) variant causes a missense, splice region 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. 1/1 splice prediction tools predict no significant impact on normal splicing. 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.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PPHLN1 NM_201439.2 missense, splice_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.09
• Publications: 0 publications found

Genes affected

PPHLN1 (HGNC:19369): (periphilin 1) The protein encoded by this gene is one of the several proteins that become sequentially incorporated into the cornified cell envelope during the terminal differentiation of keratinocyte at the outer layers of epidermis. This protein interacts with periplakin, which is known as a precursor of the cornified cell envelope. The cellular localization pattern and insolubility of this protein suggest that it may play a role in epithelial differentiation and contribute to epidermal integrity and barrier formation. Multiple alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2008]

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=0.22909254).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_201439.2. 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
	PPHLN1	NM_201439.2	MANE Select	c.240T>G	p.Asp80Glu	missense splice_region	Exon 4 of 10	NP_958847.1	Q8NEY8-8
	PPHLN1	NM_001364827.2		c.240T>G	p.Asp80Glu	missense splice_region	Exon 4 of 12	NP_001351756.1
	PPHLN1	NM_016488.7		c.240T>G	p.Asp80Glu	missense splice_region	Exon 4 of 13	NP_057572.5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PPHLN1	ENST00000358314.12	TSL:2 MANE Select	c.240T>G	p.Asp80Glu	missense splice_region	Exon 4 of 10	ENSP00000351066.7	Q8NEY8-8
	PPHLN1	ENST00000395568.6	TSL:1	c.240T>G	p.Asp80Glu	missense splice_region	Exon 4 of 13	ENSP00000378935.2	Q8NEY8-1
	PPHLN1	ENST00000432191.6	TSL:1	c.75T>G	p.Asp25Glu	missense splice_region	Exon 3 of 12	ENSP00000393965.2	Q8NEY8-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.32
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.030	T
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.23	T
MetaSVM	Uncertain	-0.27	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		2.1
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.15
Sift	Uncertain	0.0030	D
Sift4G	Benign	0.50	T
Varity_R		0.11
gMVP		0.094
Mutation Taster		=76/24	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.18		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: chr12-42748965;