NM_018836.4:c.163C>T

Variant names:

• chr1-4712033-C-T
• rs762904463
• NM_018836.4:c.163C>T
• AJAP1 p.Arg55Trp

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

0 Uncertain · Cold

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 0 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_SupportingB3_Supporting

The NM_018836.4(AJAP1):c.163C>T (p.Arg55Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The gene AJAP1 is a tumor suppressor gene (CancerMine: 11 TSG citations). The variant allele was found at a cumulative frequency of 0.0000502 (AC=80) in the gnomAD database across 1,594,156 control chromosomes (no homozygotes observed). The grpmax filtering allele frequency (95% CI) is 0.0000502. In-silico predictor (REVEL) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain Significance (★). The variant has been observed in cBioPortal in 1 sample across 1 study and 1 cancer type; somatic enrichment level: NONE (Observed in at most one deduplicated cBioPortal case.).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000052 (0 hom.)
• Consequence: AJAP1 NM_018836.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.81
• Publications: 2 publications found

Genes affected

AJAP1 (HGNC:30801): (adherens junctions associated protein 1) Enables beta-catenin binding activity. Involved in negative regulation of cell-matrix adhesion; negative regulation of wound healing; and regulation of polarized epithelial cell differentiation. Located in several cellular components, including adherens junction; basolateral plasma membrane; and cell-cell contact zone. [provided by Alliance of Genome Resources, Jul 2025]

AJAP1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder

  Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 0 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Very rare in gnomAD (popmax AF <0.01%) — O3 supporting; GnomAD effective popmax AF = 0.000050 — very rare (O3 supporting [+1])
	B3Computational evidence does not support deleterious effect		Computational evidence does not support a deleterious effect; Missense variant — primary computational scorer does not support an oncogenic/deleterious effect; supports B3

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_018836.4. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	AJAP1 NM_018836.4	MANE Select	c.163C>T p.Arg55Trp	missense	Exon 2 of 6	Prot: NP_061324.1 UniProt:
	AJAP1 NM_001042478.2		c.163C>T p.Arg55Trp	missense	Exon 2 of 6	Prot: NP_001035943.1 UniProt:

AJAP1 NM_018836.4

MANE Select

HGVSc / HGVSpc.163C>Tp.Arg55Trp

Exon rankExon 2 of 6

missense

Prot: NP_061324.1UniProt: Q9UKB5

AJAP1 NM_001042478.2

HGVSc / HGVSpc.163C>Tp.Arg55Trp

Exon rankExon 2 of 6

missense

Prot: NP_001035943.1UniProt: Q9UKB5

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	AJAP1 ENST00000378191.5	TSL:1MANE Select	c.163C>T p.Arg55Trp	missense	Exon 2 of 6	Prot: ENSP00000367433.3 UniProt:
	AJAP1 ENST00000378190.7	TSL:5	c.163C>T p.Arg55Trp	missense	Exon 2 of 6	Prot: ENSP00000367432.3 UniProt:
	AJAP1 ENST00000880749.1		c.163C>T p.Arg55Trp	missense	Exon 2 of 5	Prot: ENSP00000550808.1 UniProt:

AJAP1 ENST00000378191.5

TSL:1MANE Select

HGVSc / HGVSpc.163C>Tp.Arg55Trp

Exon rankExon 2 of 6

missense

Prot: ENSP00000367433.3UniProt: Q9UKB5

AJAP1 ENST00000378190.7

TSL:5

HGVSc / HGVSpc.163C>Tp.Arg55Trp

Exon rankExon 2 of 6

missense

Prot: ENSP00000367432.3UniProt: Q9UKB5

AJAP1 ENST00000880749.1

HGVSc / HGVSpc.163C>Tp.Arg55Trp

Exon rankExon 2 of 5

missense

Prot: ENSP00000550808.1UniProt: Q9UKB5

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 6 sources Large-scale international reference populations
GnomAD3 genomes	AF: 0.0000329	AC:5	Hom:0	AN:152178	Cov:33
GnomAD2 exomes	AF: 0.0000553	AC:12	Hom:	AN:217118	Cov:
GnomAD4 exome	AF: 0.0000520	AC:75	Hom:0	AN:1441978	Cov:37
GnomAD4 genome	AF: 0.0000329	AC:5	Hom:0	AN:152178	Cov:33
TOPMed (Bravo)	AF: 0.0000604	AC:16	Hom:0	AN:264690	Cov:
ALFA (dbGaP/dbSNP Allele Frequency Aggregator)	AF: 0.0000793	AC:3	Hom:0	AN:37824	Cov:

Showing 6 sources

Case/control cohorts

Cohort	Cases			Controls
	AF	AC	AN	AF	AC	AN
BipEx(Bipolar disorder (including schizoaffective))	0.00	0	28218	0.0000350	1	28602
SCHEMA(Schizophrenia)	0.0000461	3	65098	0.0000623	8	128384

Showing 2 cohortsAllele count / allele number. AF is computed from the counts for ASC (not provided by the source).

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Pathogenic	22
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.084
Eigen_PC	Benign	-0.19
FATHMM_MKL	Benign	0.63	D
FuncVEP CTI	Benign	0.33
GPN-Star LLR	N/A	-6.9
GPN-Star score	N/A	6.9
LIST_S2	Benign	0.85	T
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.76	D
MetaSVM	Benign	-0.83	T
Mutation Taster	N/A	86/14	polymorphism
MutationAssessor	Benign	1.1	L
PhyloP100	Benign	2.8
popEVE	Benign	-3.5
PrimateAI	Uncertain	0.78	T
PROVEAN	Pathogenic	-5.0	D
RBP_binding_hub_radar	N/A	0.0
RBP_regulation_power_radar	N/A	1.7
REVEL	Benign	0.20
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0020	D
Varity_R	N/A	0.49
VESM-3B	Benign	-5.4

Showing 30 of 30 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.0
SpliceAI score (max)	Benign	0.0	Details are displayed if max score is > 0.2

Showing 2 of 2 scores

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.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs762904463;

hg19: chr1-4772093;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar