TFF1
protein-codingtrefoil factor 1
Gene summary
Members of the trefoil family are characterized by having at least one copy of the trefoil motif, a 40-amino acid domain that contains three conserved disulfides. They are stable secretory proteins expressed in gastrointestinal mucosa. Their functions are not defined, but they may protect the mucosa from insults, stabilize the mucus layer, and affect healing of the epithelium. This gene, which is expressed in the gastric mucosa, has also been studied because of its expression in human tumors. This gene and two other related trefoil family member genes are found in a cluster on chromosome 21. [provided by RefSeq, Jul 2008]
- BCEI
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~4.3 kbGenCC Phenotypes & Disease Associations
Curated gene-disease validity assertions and inheritance patterns
No GenCC data available for this gene.
ClinVar Associated Diseases & Phenotypes
Reported disease conditions connected to TFF1 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_003225.3. Only rare variants are included.
We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.
Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.
| Effect | PathogenicP | Likely pathogenicLP | VUS | Likely benignLB | BenignB | Sum |
|---|---|---|---|---|---|---|
| synonymous | 1 | 1 | ||||
| missense | 13 | 13 | ||||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 13 | 0 | 1 | 14 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_003216.1 | 3 | MANE Select | |
| Ensembl | ENSP00000291527.2 | 3 | MANE Select | |
| Ensembl | ENSP00000680879.1 | 3 | Standard | |
| Ensembl | ENSP00000763045.1 | 3 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- Estrogen signaling pathway - Homo sapiens (human)
- Signal Transduction
- trefoil factors initiate mucosal healing
- FOXA1 transcription factor network
- Signaling by Nuclear Receptors
Biological Process
- carbohydrate metabolic process
- negative regulation of cell population proliferation
- response to iron ion
- regulation of signaling receptor activity
- cell differentiation
Molecular Function
- protein binding
- growth factor activity
Cellular Component
- extracellular region
- extracellular space
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000291527
- Coding exons
- 3
- Length
- 4313
- Individuals with no LoFs
- 125731
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 12
- Defined
- 125743
- p
- 0.0000477
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | -0.134 | 57 | 54.2 | 1.05 | 0.00000342 | 541 |
| Missense (PolyPhen) | 14 | 15.352 | 0.9119 | 170 | ||
| Synonymous | -0.243 | 25 | 23.5 | 1.06 | 0.00000174 | 166 |
| Loss of Function | -0.453 | 4 | 3.13 | 1.28 | 1.33e-7 | 38 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0.000062 | 0.000062 | rare |
| Latino/Admixed American | 0.00017 | 0.00017 | rare |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0.00011 | 0.00011 | rare |
| Finnish | 0 | 0.0 | absent |
| European (Non-Finnish) | 0.000018 | 0.000018 | rare |
| South Asian | 0 | 0.0 | absent |
| Other | 0.00016 | 0.00016 | rare |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Stabilizer of the mucous gel overlying the gastrointestinal mucosa that provides a physical barrier against various noxious agents. May inhibit the growth of calcium oxalate crystals in urine. {ECO:0000269|PubMed:16308573}.;
Recessive Scores
- pRec
- 0.255
Intolerance Scores
- LoFtool
- 0.685
- RVIS EVS
- 0.53
- RVIS percentile EVS
- 80.58
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- N
- Essential (gene trap)
- N
- Indispensability pred.
- E
- Indispensability score
- 0.688
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |