Genetic Variant PACC1:p.Phe204Ser (chr1-212379922-A-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_018252.3(PACC1):c.611T>C(p.Phe204Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

PACC1
NM_018252.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.68

Publications

0 publications found

Variant links:

Genes affected

PACC1 (HGNC:25593): (proton activated chloride channel 1) Enables pH-gated chloride channel activity. Involved in chloride transport. Is integral component of plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

PACC1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.84

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PACC1	NM_018252.3 link	c.611T>C	p.Phe204Ser	missense_variant	Exon 5 of 8	ENST00000261455.9	NP_060722.2	Q9H813-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PACC1	ENST00000261455.9 link	c.611T>C	p.Phe204Ser	missense_variant	Exon 5 of 8	1	NM_018252.3	ENSP00000261455.4	Q9H813-1
PACC1	ENST00000535273.2 link	c.794T>C	p.Phe265Ser	missense_variant	Exon 6 of 9	2		ENSP00000438863.1	Q9H813-2
PACC1	ENST00000467822.5 link	n.517T>C		non_coding_transcript_exon_variant	Exon 4 of 6	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727244

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112004

Other (OTH)

AF:

0.00

AC:

AN:

60396

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 13, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.794T>C (p.F265S) alteration is located in exon 6 (coding exon 6) of the TMEM206 gene. This alteration results from a T to C substitution at nucleotide position 794, causing the phenylalanine (F) at amino acid position 265 to be replaced by a serine (S). 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

Pathogenic

0.97

BayesDel_addAF

Pathogenic

0.45

BayesDel_noAF

Pathogenic

0.41

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

T;.

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.87

D;D

M_CAP

Benign

0.021

MetaRNN

Pathogenic

0.84

D;D

MetaSVM

Benign

-0.47

MutationAssessor

Benign

2.0

M;.

PhyloP100

8.7

PrimateAI

Uncertain

0.72

PROVEAN

Pathogenic

-6.9

D;D

REVEL

Pathogenic

0.83

Sift

Uncertain

0.0060

D;D

Sift4G

Uncertain

0.018

D;D

Polyphen

0.33

B;.

Vest4

0.91

MutPred

0.71

Gain of disorder (P = 0.0107);.;

MVP

0.12

MPC

0.80

ClinPred

0.99

GERP RS

5.6

Varity_R

0.88

gMVP

0.85

Mutation Taster

=10/90

disease causing

(source)

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

Publications

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1-212379922-A-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over