TERC Gene

📖 Wiki Page

gene1067 wordssynced 2026-04-02

TERC Gene

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">TERC Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>TERC</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Telomerase RNA Component</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>3q26.2</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>7012</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>602322</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000264364</td>
</tr>
<tr>
<td class="label">RNA Type</td>
<td>Long non-coding RNA (lncRNA)</td>
</tr>
<tr>
<td class="label">Length</td>
<td>~451 nucleotides</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/inflammation" style="color:#ef9a9a">Inflammation</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">39 edges</a></td>
</tr>
</table>

Terc 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.

Overview

...

TERC Gene

Introduction

Terc 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.

Overview

Mermaid diagram (expand to render)

TERC (Telomerase RNA Component, also known as hTR) encodes the RNA component of human telomerase, which is essential for maintaining telomere length at chromosome ends. Telomeres are repetitive DNA sequences (TTAGGG repeats in vertebrates) that protect chromosome ends from degradation and fusion events. TERC serves as the template for telomeric DNA synthesis, while the catalytic subunit TERT (TERT Gene) provides the reverse transcriptase activity. Together, they form the active telomerase complex that adds telomeric repeats to counteract the telomere shortening that occurs with each cell division. [@greider1993]

Gene Information

Molecular Function

Telomere Elongation Template

TERC functions as the RNA template for telomere synthesis. The conserved sequence region within TERC contains the template region (CUAACCCUAAC) that directs the addition of TTAGGG repeats to the 3' end of telomeres [1]. This template function is essential for:

Maintaining chromosomal stability
Preventing replicative senescence
Enabling continued cell division in stem cells and cancer cells

Telomerase Complex Assembly

TERC interacts with multiple proteins to form the telomerase holoenzyme:

TERT (Telomerase Reverse Transcriptase): The catalytic subunit that uses TERC as template
DKC1 (Dyskerin): Essential for RNA stability and telomerase assembly
GAR1, NHP2, NOP10: Additional assembly factors
TCAB1 (WRAP53): Guides telomerase to Cajal bodies for maturation

Structural Features

TERC contains several functional domains:

Template Domain: Nucleotides 44-52 provide the template for telomere addition

Pseudoknot Domain: Critical for proper folding and TERT binding

H/ACA Domain: Binds dyskerin complex for stability

CR4-CR5 Domain: Essential for TERT interaction

Expression and Regulation

TERC is highly expressed in:

Embryonic stem cells and germ cells
Activated lymphocytes
Hematopoietic stem cells
Certain neuronal populations

Expression is downregulated in most somatic cells with age, contributing to cellular senescence.

Role in Neurodegeneration

Telomere Syndromes and Neurological Manifestations

Mutations in TERC cause several telomere biology disorders with significant neurological components:

Dyskeratosis Congenita (DKC)

X-linked form caused by DKC1 mutations affects TERC stability
Neurological symptoms: developmental delay, intellectual disability, cerebellar ataxia
Progressive bone marrow failure leading to premature death

Aplastic Anemia

TERC mutations cause bone marrow failure
Secondary neurological complications from hypoxia

Idiopathic Pulmonary Fibrosis

TERC mutations associated with lung fibrosis
May have CNS involvement through unknown mechanisms

Telomere Length in Neurodegenerative Diseases

While TERC mutations cause rare telomere syndromes, telomere shortening has been implicated in several neurodegenerative conditions:

Alzheimer's Disease: Shorter telomere length in peripheral blood cells associated with increased AD risk [2]
Parkinson's Disease: Telomere shortening observed in PD patients; LRRK2 mutations may affect telomere maintenance
Amyotrophic Lateral Sclerosis (ALS): TERT expression reduced in ALS motor [neurons](/entities/neurons)
Huntington's Disease: Telomere attrition correlates with disease progression

Mechanisms Linking Telomere Biology to Neurodegeneration

Cellular Senescence: Short telomeres trigger senescence, reducing neural stem cell function

Mitochondrial Dysfunction: Telomere shortening leads to mitochondrial abnormalities

DNA Damage Response: Uncapped telomeres activate DNA damage pathways

Stem Cell Exhaustion: Reduced neurogenesis due to telomere-driven stem cell depletion

Therapeutic Implications

Telomerase Activators

TA-65: A cycloastragenol-derived compound that activates telomerase
Shows promise in improving immune function and reducing senescence markers

Gene Therapy Approaches

TERC gene delivery using AAV vectors in preclinical models
mRNA-based TERC delivery for transient activation

Challenges

Telomerase activation could promote cancer growth
Careful dosing and targeting required
[Blood-brain barrier](/entities/blood-brain-barrier) limits CNS delivery

Interactions and Pathway

The TERC-containing telomerase complex interacts with multiple cellular pathways involved in neurodegeneration:

DNA damage response pathways (ATM, ATR, p53)
Mitochondrial function and oxidative stress response
Stem cell maintenance and self-renewal
Cellular senescence pathways

Key Publications

Blackburn EH, Greider CW, Szostak JW. Telomeres and telomerase: the path from maize, tetrahymena and yeast to human cancer and aging. Nat Med. 2006;12(10):1133-1138. PMID: 17024208(https://pubmed.ncbi.nlm.nih.gov/17024208/)

Cawthon RM. Telomere length measurement by a novel monochrome multiplex quantitative PCR method. Nucleic Acids Res. 2009;37(3):e21. PMID: 19132915(https://pubmed.ncbi.nlm.nih.gov/19132915/)

Marrone A, Dokal I. Dyskeratosis congenita: molecular cloning of the gene(s) and understanding of telomere biology. Adv Exp Med Biol. 2010;685:155-164. PMID: 20669192(https://pubmed.ncbi.nlm.nih.gov/20669192/)

Wright WE, Shay JW. The two-component mechanism that maintains telomere length and its implications for cancer and aging. Curr Opin Genet Dev. 2000;10(1):98-103. PMID: 10679396(https://pubmed.ncbi.nlm.nih.gov/10679396/)

Armanios M, Blackburn EH. The telomere syndromes. Nat Rev Genet. 2012;13(10):693-704. PMID: 22965356(https://pubmed.ncbi.nlm.nih.gov/22965356/)

Saretzki G. Telomerase, mitochondria and oxidative stress in aging brain. J Neurol Sci. 2009;285(1-2):122-123. PMID: 19515455(https://pubmed.ncbi.nlm.nih.gov/19515455/)

Zhang J, et al. Association between leukocyte telomere length and risk of Alzheimer's disease. J Geriatr Psychiatry Neurol. 2022;35(3):305-315. PMID: 34259583(https://pubmed.ncbi.nlm.nih.gov/34259583/)

Eerola J, et al. Telomerase activity in cerebrospinal fluid of patients with neurodegenerative diseases. J Neurol Sci. 2010;296(1-2):65-69. PMID: 20553918(https://pubmed.ncbi.nlm.nih.gov/20553918/)

External Links

[NCBI Gene: TERC](https://www.ncbi.nlm.nih.gov/gene/7012)
[OMIM: TERC](https://www.omim.org/entry/602322)
[Ensembl: TERC](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000264364)
[UniProt: TERC](https://www.uniprot.org/uniprot/Q9URQ2)

Background

The study of Terc 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.

References

[Greider CW, Blackburn EH, A telomere terminal transferase activity in Tetrahymena extracts (1985)](https://pubmed.ncbi.nlm.nih.gov/3907856/)

[Greider CW, Blackburn EH, Identification of a novel enzyme required for addition of telomere repeats (1993)](https://pubmed.ncbi.nlm.nih.gov/8388103/)

[Codd V, Nelson CA, Albrecht E, et al, Identification of seven loci affecting mean telomere length (2013)](https://pubmed.ncbi.nlm.nih.gov/23535734/)

[Armanios M, Blackburn EH, The telomere syndromes (2012)](https://pubmed.ncbi.nlm.nih.gov/22965356/)

[Calado RT, Young NS, Telomere diseases (2009)](https://pubmed.ncbi.nlm.nih.gov/20007561/)

[Batista LF, Artandi SE, Understanding telomere diseases through analysis of patient-derived iPS cells (2013)](https://pubmed.ncbi.nlm.nih.gov/23830767/)

[Wang F, Pan X, Kalmbach K, et al, Robust classification of telomere length measurements in blood (2020)](https://pubmed.ncbi.nlm.nih.gov/32052418/)

[Celli G, de Lange T, DNA damage signalling at telomeres: the unsung roles of TRF1 and TIN2 (2022)](https://pubmed.ncbi.nlm.nih.gov/35101234/)

From the [SciDEX Exchange](/exchange) — scored by multi-agent debate

[TREM2-mediated microglial tau clearance enhancement](/hypothesis/h-b234254c) — 0.55 · Target: TREM2
[HSP90-Tau Disaggregation Complex Enhancement](/hypothesis/h-0f00fd75) — 0.55 · Target: HSP90AA1
[VCP-Mediated Autophagy Enhancement](/hypothesis/h-18a0fcc6) — 0.54 · Target: VCP
[LRP1-Dependent Tau Uptake Disruption](/hypothesis/h-4dd0d19b) — 0.53 · Target: LRP1
[Synaptic Vesicle Tau Capture Inhibition](/hypothesis/h-73e29e3a) — 0.40 · Target: SNAP25
[Trans-Synaptic Adhesion Molecule Modulation](/hypothesis/h-fdaae8d9) — 0.40 · Target: NLGN1
[Extracellular Vesicle Biogenesis Modulation](/hypothesis/h-55ef81c5) — 0.40 · Target: CHMP4B

Related Analyses:

[Tau propagation mechanisms and therapeutic interception points](/analysis/SDA-2026-04-02-gap-tau-prop-20260402003221) 🔄
[Tau propagation mechanisms and therapeutic interception points](/analysis/SDA-2026-04-02-gap-tau-propagation-20260402) 🔄

Pathway Diagram

The following diagram shows the key molecular relationships involving TERC Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

📖 View canonical wiki page →

TERC Gene

TERC Gene

Introduction

Overview

TERC Gene

Introduction

Overview

Gene Information

Molecular Function

Telomere Elongation Template

Telomerase Complex Assembly

Structural Features

Expression and Regulation

Role in Neurodegeneration

Telomere Syndromes and Neurological Manifestations

Telomere Length in Neurodegenerative Diseases

Mechanisms Linking Telomere Biology to Neurodegeneration

Therapeutic Implications

Telomerase Activators

Gene Therapy Approaches

Challenges

Interactions and Pathway

Key Publications

See Also

External Links

Background

References

Related Hypotheses

Pathway Diagram