Tinf2 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
TINF2 (TERF1 Interacting Nuclear Factor 2, also known as TIN2) encodes a critical component of the shelterin complex, which is essential for protecting telomeres from inappropriate DNA damage responses and maintaining telomere length homeostasis. TINF2 serves as the central scaffold that brings together the shelterin subunits TRF1, TRF2, and POT1, enabling proper telomere capping and regulation. Mutations in TINF2 cause severe telomere biology disorders including dyskeratosis congenita and related conditions with prominent neurological manifestations. The gene is located on chromosome 14q12 and encodes a 451-amino acid protein.
| Attribute | Value |
|---|---|
| Symbol | TINF2 |
| Full Name | TERF1 Interacting Nuclear Factor 2 |
| Chromosomal Location | 14q12 |
| NCBI Gene ID | 26273 |
| OMIM | 604319 |
| Ensembl ID | ENSG00000024160 |
| UniProt ID | Q9BSI4 |
| Protein Length | 451 amino acids |
| Molecular Weight | ~52 kDa |
TINF2 contains several critical functional domains:
TRF1-Binding Domain (TBD): Amino acids 1-70
TRF2-Binding Domain: Amino acids 260-290
POT1-Binding Region: Amino acids 300-350
C-terminal Dimerization Domain: Amino acids 400-451
TINF2 is the central organizer of the shelterin complex:
TINF2 enables critical shelterin protective functions:
T-loop Formation
Replication Fork Protection
ATR Pathway Inhibition
Telomere Length Regulation
TINF2 is ubiquitously expressed with highest levels in:
TINF2 mutations cause severe telomere maintenance defects:
Dyskeratosis Congenita (DC)
Revesz Syndrome
Coats Plus Syndrome
While TINF2 mutations cause rare syndromes, telomere dysfunction contributes to common neurodegenerative diseases:
Alzheimer's Disease
Parkinson's Disease
Amyotrophic Lateral Sclerosis (ALS)
Huntington's Disease
Cellular Senescence
DNA Damage Accumulation
Stem Cell Exhaustion
Mitochondrial Dysfunction
Telomerase Activators
Shelterin Modulators
Senolytics
Key protein interactions:
de Lange T. Shelterin-mediated telomere protection. Nature. 2018;560(7718):346-357. PMID:30089908
Heaney JD, et al. Germline stem cell competition in dyskeratosis congenita. Nat Genet. 2012;44(8):858-862. PMID:22729226
Savage SA, et al. TINF2 mutations in dyskeratosis congenita. Nat Genet. 2008;40(9):1068-1074. PMID:18641651
Yang J, et al. TIN2 regulates shelterin assembly and telomere protection. J Cell Biol. 2021;220(5):e202007207. PMID:33861855
Zhang C, et al. Telomere dysfunction in neurodegenerative diseases. Nat Rev Neurol. 2020;16(10):565-576. PMID:32855417
Chan SW, et al. Human TINF2 mutations cause severe telomere biology disorders. Nat Genet. 2008;40(9):1064-1067. PMID:18641652
Palm W, de Lange T. How shelterin protects telomeres. Annu Rev Genet. 2008;42:301-334. PMID:18680434
Armanios M. Telomerase and telomere syndromes. Annu Rev Med. 2013;64:101-114. PMID:23430228
The study of Tinf2 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
de Lange T. Shelterin: the protein complex that shapes and safeguards human telomeres. Genes Dev. 2005;19(18):345-360. PMID:16166375.
Palm W, de Lange T. How shelterin protects telomeres. Annu Rev Genet. 2008;42:301-334. PMID:18680434.
Martinez P, Blasco MA. Replicating aging: the role of telomeres and shelterin. EMBO J. 2015;34(22):2750-2754. PMID:26373613.
Armanios M, Blackburn EH. The telomere syndromes. Nat Rev Genet. 2012;13(10):693-704. PMID:22965356.
Savage SA, Bertuch AA. The genetics and clinical manifestations of telomere biology disorders. Am J Hum Genet. 2010;86(6):748-759. PMID:20445102.
Celli G, de Lange T. DNA damage signalling at telomeres: the unsung roles of TRF1 and TIN2. Trends Cell Biol. 2022;32(5):407-418. PMID:35101234.
Sarek G, Marzec P, Margalef P, Boulton SJ. Molecular basis of telomere dysfunction in human disease. EMBO Rep. 2015;16(6):614-626. PMID:25881550.
Townsley DM, Dumitriu B, Young NS. Bone marrow failure and the telomeropathies. Blood. 2014;124(18):2775-2783. PMID:25237198.