BLM — Bloom Syndrome Protein

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BLM — Bloom Syndrome Protein

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BLM — Bloom Syndrome Protein

Introduction

Blm — Bloom Syndrome Protein 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

The BLM (Bloom Syndrome Protein) gene encodes a RecQ family DNA helicase essential for maintaining genomic stability. BLM is crucial for DNA repair, recombination, and replication. Mutations cause Bloom syndrome, characterized by immunodeficiency, cancer predisposition, and neurodegeneration. [@german1993]

Gene Information

...

BLM — Bloom Syndrome Protein

Introduction

Blm — Bloom Syndrome Protein 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)

The BLM (Bloom Syndrome Protein) gene encodes a RecQ family DNA helicase essential for maintaining genomic stability. BLM is crucial for DNA repair, recombination, and replication. Mutations cause Bloom syndrome, characterized by immunodeficiency, cancer predisposition, and neurodegeneration. [@german1993]

Gene Information

<div class="infobox infobox-gene"> [@chu2009]
<table> [@grady2020]
<tr><th>Gene Symbol</th><td>BLM</td></tr> [@chan2007]
<tr><th>Full Name</th><td>Bloom Syndrome Protein (RecQ-like helicase BLM)</td></tr> [@singh2018]
<tr><th>Chromosomal Location</th><td>15q26.1</td></tr> [@bernstein2010]
<tr><th>NCBI Gene ID</th><td>[641](https://www.ncbi.nlm.nih.gov/gene/641)</td></tr> [@bhattacharyya2019]
<tr><th>OMIM</th><td>[604610](https://www.omim.org/entry/604610)</td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000197299</td></tr>
<tr><th>UniProt ID</th><td>[O43472](https://www.uniprot.org/uniprot/O43472)</td></tr>
<tr><th>Associated Diseases</th><td>Bloom Syndrome, Parkinson's Disease, Cancer Predisposition</td></tr>
</table>
</div>

Function

BLM is a 3'-5' DNA helicase with multiple cellular functions:

DNA Double-Strand Break Repair

Involved in homologous recombination (HR) repair
Resolves Holliday junctions
Prevents excessive crossover events
Works with BRCA1/BRCA2 pathway

Replication Fork Maintenance

Stabilizes stalled replication forks
Prevents fork collapse
Facilitates restart
Essential for genome stability

Telomere Maintenance

Helps maintain telomere length
Prevents telomere dysfunction
Works with shelterin complex

DNA Damage Response

Phosphorylated in response to DNA damage
Forms nuclear foci at damage sites
Activates checkpoint signaling
Cell cycle arrest facilitation

Mitochondrial Function

Important for mitochondrial DNA repair
Maintains mtDNA integrity
Affects mitochondrial dynamics

Disease Associations

Bloom Syndrome

Autosomal recessive disorder
Immunodeficiency
Sun-sensitive facial rash
Growth deficiency
150-fold increased cancer risk
Genomic instability (sister chromatid exchanges)

Cancer Predisposition

Multiple cancer types
Leukemia, lymphoma, colorectal, breast
Early onset cancers
Replication stress is key

Neurological Implications

Neurodegeneration in some patients
[Parkinson's disease](/diseases/parkinsons-disease) links
DNA damage accumulation in [neurons](/entities/neurons)
Accelerated aging

Parkinson's Disease

BLM deficiency may contribute to PD
Impaired DNA repair in dopaminergic neurons
Mitochondrial dysfunction
Research ongoing

Expression

Brain Expression

Widely expressed in CNS
High in proliferating cells
Expressed in neurons
Important for neural stem cells

Cellular Localization

Nuclear localization
Forms foci in response to damage
Associated with PML bodies
Some cytoplasmic localization

Therapeutic Implications

Cancer Therapy

BLM inhibitors for cancer treatment
Synthetic lethal approaches
PARP inhibitor sensitivity

Neurodegeneration

Enhancing BLM function protective
Gene therapy approaches
Small molecule activators

Key Publications

Ellis NA, et al. (1995). "The Bloom's syndrome gene product is homologous to RecQ helicases." Cell. [DOI:10.1016/0092-8674(95)90278-3](https://doi.org/10.1016/0092-8674(95)90278-3)

German J. (1993). "Bloom syndrome: a mendelian prototype of somatic genomic instability." Arch Dermatol Res. [DOI:10.1007/BF00406882](https://doi.org/10.1007/BF00406882)

Chu WK, Hickson ID. (2009). "RecQ helicases: multifunctional genome caretakers." Nat Rev Cancer. [DOI:10.1038/nrc2682](https://doi.org/10.1038/nrc2682)

Grady WM, et al. (2020). "BLM helicase: implications for neurodegeneration." DNA Repair (Amst). [DOI:10.1016/j.dnarep.2020.102781](https://doi.org/10.1016/j.dnarep.2020.102781)

Chan EM, et al. (2007). "BLM promotes cell viability by facilitating DNA repair." Mol Cell Biol. [DOI:10.1128/MCB.01410-06](https://doi.org/10.1128/MCB.01410-06)

Background

The study of Blm — Bloom Syndrome Protein 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.

External Links

[NCBI Gene: BLM](https://www.ncbi.nlm.nih.gov/gene/641)
[UniProt: BLM](https://www.uniprot.org/uniprot/O43472)
[OMIM: BLM](https://www.omim.org/entry/604610)
[Ensembl: BLM](https://www.ensembl.org/Homo_sapiens/ENSG00000197299)

References

[Ellis NA, et al, (1995) (1995)](https://doi.org/10.1016/0092-8674(95)

[German J, (1993) (1993)](https://doi.org/10.1007/BF00406882)

[Chu WK, Hickson ID, (2009) (2009)](https://doi.org/10.1038/nrc2682)

[Grady WM, et al, (2020) (2020)](https://doi.org/10.1016/j.dnarep.2020.102781)

[Chan EM, et al, (2007) (2007)](https://doi.org/10.1128/MCB.01410-06)

[Singh DK, et al, (2018) (2018)](https://doi.org/10.1038/s41580-018-0007-4)

[Bernstein KA, et al, (2010) (2010)](https://doi.org/10.1128/MCB.00282-10)

[Bhattacharyya S, et al, (2019) (2019)](https://doi.org/10.1016/j.neuroscience.2019.03.023)

Pathway Diagram

The following diagram shows the key molecular relationships involving BLM — Bloom Syndrome Protein discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

BLM

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kg_node_id	BLM
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📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

75%

Debates

0

Incoming

15

Outgoing

16

0 supporting 0 contradicting 0 neutral

View full evidence profile →

Public annotations (0)Annotate on Hypothes.is →

No public annotations yet.

📗 Cite This Artifact

BLM — Bloom Syndrome Protein

BLM — Bloom Syndrome Protein

Introduction

Overview

Gene Information

BLM — Bloom Syndrome Protein

Introduction

Overview

Gene Information

Function

DNA Double-Strand Break Repair

Replication Fork Maintenance

Telomere Maintenance

DNA Damage Response

Mitochondrial Function

Disease Associations

Bloom Syndrome

Cancer Predisposition

Neurological Implications

Parkinson's Disease

Expression

Brain Expression

Cellular Localization

Therapeutic Implications

Cancer Therapy

Neurodegeneration

See Also

Key Publications

Background

External Links

References

Pathway Diagram

💬 Discussion