GO:1990713 survivin complex: Components, Assembly and Research Methods, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1990713 (survivin complex) is a cellular component defined as a protein complex that negatively regulates apoptotic processes and contains a baculoviral IAP repeat-containing protein.
• The complex is best known as a homodimer of BIRC5 (survivin) and as a subcomplex of the chromosomal passenger complex (CPC) with Aurora B, INCENP, and borealin.
• Survivin complex functions include spindle assembly, chromosome segregation, and inhibition of apoptosis, making it essential for mitosis and cell survival.
• Dysregulation of the survivin complex is strongly linked to cancer, where it serves as a biomarker and therapeutic target.
• Noncanonical roles include regulation of glycolysis via borealin-mediated survivin stabilization in squamous cell carcinoma.
• CRISPR-based models (knockout, point mutation, knock-in, overexpression) are powerful tools to dissect survivin complex biology and validate therapeutic hypotheses.
Description
The survivin complex (GO:1990713) is a cellular component that negatively regulates apoptosis and contains a baculoviral IAP repeat (BIR) domain protein. It is best characterized as a homodimer of survivin (BIRC5) and as a component of the chromosomal passenger complex (CPC), where it partners with Aurora B kinase, INCENP, and borealin to coordinate mitosis. This complex is critical for proper chromosome segregation, spindle assembly, and cell survival, and its dysfunction is implicated in cancer and other proliferative disorders. Researchers study the survivin complex to understand fundamental cell division mechanisms and to develop targeted therapies, as it is a validated cancer biomarker and drug target. The complex also exhibits noncanonical functions, such as promoting glycolysis in squamous cell carcinoma through borealin-mediated stabilization of survivin. Given its central role in cell fate, the survivin complex is a prime subject for CRISPR-based functional genomics and drug discovery.
survivin complex At A Glance
| GO ID | GO:1990713 |
|---|---|
| GO term | survivin complex |
| Ontology | cellular_component |
| Synonym | Baculoviral IAP repeat-containing protein 5 complex; survivin homodimer complex |
| Major function | Negative regulation of apoptotic processes; mitotic regulation |
| Complex components | Survivin (BIRC5) homodimer; associates with Aurora B, INCENP, borealin in CPC |
| Cellular localization | Nucleus, cytoplasm, mitotic spindle, centromere, midbody |
| Disease relevance | Cancer, chemoresistance, proliferative disorders |
What Is GO:1990713?
According to the Gene Ontology, GO:1990713 (survivin complex) is a protein complex that negatively regulates apoptotic processes. It contains at least one component belonging to the family of baculoviral IAP (inhibitor of apoptosis) repeat-containing proteins. Synonyms include Baculoviral IAP repeat-containing protein 5 complex and survivin homodimer complex. In practice, this complex is often observed as a homodimer of survivin (BIRC5) and as a subcomplex within the chromosomal passenger complex, where it interacts with Aurora B, INCENP, and borealin to regulate mitosis and apoptosis.
Why Is survivin complex Important in Cell Biology?
The survivin complex is a central regulator of cell division and survival, making it indispensable for normal development and tissue homeostasis. Its overexpression is a hallmark of many cancers and correlates with poor prognosis and resistance to therapy. Understanding its assembly, regulation, and noncanonical functions can reveal new therapeutic vulnerabilities, particularly in cancers that depend on survivin for mitosis and apoptosis evasion. Moreover, the complex serves as a paradigm for studying the interplay between apoptosis and mitosis, with implications for drug discovery and precision medicine.
• Survivin complex is a key inhibitor of apoptosis, promoting cell survival under stress.
• It is essential for chromosome segregation and cytokinesis as part of the chromosomal passenger complex.
• Overexpression of survivin is observed in most human cancers and is associated with poor clinical outcome.
• The complex regulates spindle assembly and mitotic checkpoint, and its dysfunction leads to aneuploidy.
• Noncanonical roles include metabolic reprogramming via glycolysis in squamous cell carcinoma.
• Survivin is a validated biomarker for cancer diagnosis and prognosis.
• Targeting the survivin complex is a promising anticancer strategy, including with CRISPR screens.
• The complex interacts with chromatin-modifying machinery to activate DNA damage response in CD4+ cells.
• It serves as a model for studying BIR-domain protein function in apoptosis and mitosis.
• CRISPR-based models enable precise dissection of survivin complex gene functions.
What Happens During survivin complex?
Assembly of the survivin homodimer
In simple terms: Survivin proteins pair up to form a stable dimer that can block cell death.
Survivin (BIRC5) contains a single baculoviral IAP repeat (BIR) domain and forms a homodimer in solution. This homodimer is the core of the survivin complex and is essential for its anti-apoptotic function. The dimerization interface involves the BIR domain and is regulated by phosphorylation and other post-translational modifications. The homodimer can further associate with other proteins to form larger complexes, such as the chromosomal passenger complex.
Formation of the chromosomal passenger complex (CPC)
In simple terms: Survivin teams up with other proteins to ensure chromosomes are divided correctly during cell division.
The survivin complex is a subunit of the chromosomal passenger complex (CPC), which also contains Aurora B kinase, INCENP, and borealin. The CPC regulates chromosome segregation, spindle assembly, and cytokinesis. Survivin targets the CPC to centromeres and the midbody, where it coordinates tension sensing and attachment of kinetochores to microtubules. Disruption of the CPC leads to mitotic defects and aneuploidy.
Regulation of apoptosis
In simple terms: The survivin complex acts as a brake on programmed cell death.
Survivin complex negatively regulates apoptotic processes by inhibiting caspases, particularly caspase-9 and caspase-3, and by interfering with mitochondrial apoptosis signaling. It also modulates the DNA damage response and can promote cell survival under stress. The anti-apoptotic activity of survivin is tightly linked to its dimerization and its interaction with other IAP proteins.
Noncanonical roles in metabolism and chromatin
In simple terms: Survivin also has jobs outside cell division, like influencing sugar metabolism and gene expression.
Recent studies have revealed noncanonical functions of the survivin complex. In squamous cell carcinoma, borealin, a CPC component, stabilizes survivin to promote glycolysis, linking the complex to metabolic reprogramming. Additionally, survivin and BRG1/SWI complex cooperate to activate DNA damage response genes in CD4+ cells, indicating a role in chromatin regulation. These findings expand the functional repertoire of the survivin complex beyond mitosis and apoptosis.
Key Genes Involved in GO:1990713 survivin complex
The following genes and proteins are key components or interactors of the survivin complex, with established roles in its assembly, regulation, and function.
| Gene | Major Role | Research Relevance |
|---|---|---|
| BIRC5 (survivin) | Core component; homodimer; inhibits apoptosis | Cancer biomarker; therapeutic target; CRISPR KO models |
| AURKB (Aurora B) | Kinase subunit of CPC; regulates chromosome segregation | Mitotic checkpoint; drug target |
| INCENP | Scaffold protein of CPC; activates Aurora B | CPC assembly; mitosis research |
| CDCA8 (borealin) | CPC component; stabilizes survivin; promotes glycolysis | Noncanonical roles; cancer metabolism |
| CASP3 | Executioner caspase inhibited by survivin | Apoptosis assays; KO models |
| CASP9 | Initiator caspase inhibited by survivin | Apoptosis signaling |
| XIAP | IAP family member; interacts with survivin | Apoptosis regulation |
| DIABLO (SMAC) | Antagonist of IAPs; binds survivin | Apoptosis sensitization |
| HSP90 | Chaperone stabilizing survivin | Protein stability; drug targeting |
| CDK1 | Phosphorylates survivin; regulates mitosis | Cell cycle control |
| PLK1 | Regulates CPC and survivin localization | Mitotic progression |
| BRG1 (SMARCA4) | Chromatin remodeler; cooperates with survivin | DNA damage response; CD4+ cells |
| RAN | Forms complex with survivin; regulates spindle | Spindle assembly; tumor cells |
| TP53 | Tumor suppressor; indirectly regulates survivin | Cancer genetics |
| MYC | Oncogene; upregulates survivin expression | Cancer progression |
| STAT3 | Transcription factor; activates survivin | Inflammation and cancer |
| NF-κB | Transcription factor; induces survivin | Survival signaling |
How Is survivin complex Regulated?
The survivin complex is regulated at multiple levels. Transcription of BIRC5 is controlled by oncogenic pathways such as STAT3, NF-κB, and MYC. Post-translational modifications, including phosphorylation by CDK1 and PLK1, regulate its localization and interaction with CPC components. The protein is stabilized by HSP90 and degraded by the proteasome, and its interaction with borealin enhances stability in cancer cells. Additionally, survivin expression is cell-cycle dependent, peaking at G2/M, and is modulated by DNA damage response pathways involving BRG1/SWI complex. These regulatory mechanisms ensure tight control of survivin complex activity during mitosis and apoptosis.
survivin complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| BIRC5 | Cancer (multiple types); apoptosis resistance | CRISPR KO in cancer cell lines; xenograft models |
| AURKB | Cancer; mitotic defects | Point mutation knock-in; kinase inhibitors |
| CDCA8 | Squamous cell carcinoma; glycolysis | Overexpression and KO in SCC lines |
| SMARCA4 | Cancer; DNA damage response | Knock-in of BRG1 mutants; CD4+ T cell models |
| CASP3 | Apoptosis dysregulation | KO and point mutation in apoptosis reporter lines |
Cancer
Survivin complex is overexpressed in a wide range of human cancers, including lung, breast, colorectal, and prostate cancer, and its expression correlates with poor prognosis, increased proliferation, and resistance to chemotherapy. As a member of the inhibitor of apoptosis family, it promotes tumor cell survival and is considered a promising therapeutic target. Noncanonical roles in glycolysis further support cancer cell metabolism.
Mitotic defects and aneuploidy
Dysregulation of the chromosomal passenger complex, of which survivin is a subunit, leads to chromosome missegregation, aneuploidy, and genomic instability, which are hallmarks of cancer and developmental disorders. Mutations or altered expression of CPC components can cause mitotic catastrophe.
Immune and inflammatory disorders
Survivin complex is involved in DNA damage response in CD4+ T cells, and its interaction with BRG1/SWI complex suggests a role in immune cell survival and function. Altered survivin expression has been linked to autoimmune diseases and inflammatory conditions, although the mechanisms are still being elucidated.
From survivin complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does BIRC5 knockout induce apoptosis and reduce tumor growth? | CRISPR KO in cancer cell lines and mouse xenografts |
| How do point mutations in the BIR domain affect survivin dimerization? | CRISPR point mutation knock-in in endogenous BIRC5 locus |
| Can a tagged survivin knock-in reveal dynamic localization during mitosis? | CRISPR knock-in of fluorescent tag (e.g., GFP) at BIRC5 locus |
| What is the effect of survivin overexpression on chemoresistance? | CRISPR overexpression via safe-harbor integration |
| Which genes are synthetic lethal with survivin loss? | Genome-wide CRISPR library screening |
| How does borealin regulate survivin stability and glycolysis? | KO and overexpression of CDCA8 in SCC cells |
How to Study the survivin complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR KO | Gene function loss | Apoptosis and proliferation assays |
| CRISPR point mutation | Specific amino acid function | Dimerization and phosphorylation studies |
| CRISPR knock-in | Tagged protein localization | Live-cell imaging of mitosis |
| CRISPR overexpression | Gain-of-function effects | Chemoresistance and oncogenesis |
| CRISPR library screening | Genome-wide genetic interactions | Synthetic lethality with survivin loss |
| AP-MS | Protein-protein interactions | Mapping survivin complex interactome |
| RNA-seq | Transcriptional changes | Pathway analysis after perturbation |
| Live-cell imaging | Dynamic localization | CPC assembly and chromosome segregation |
CRISPR-based functional genomics
CRISPR knockout, point mutation, knock-in, and overexpression models enable precise dissection of survivin complex gene functions. Genome-wide CRISPR screens can identify synthetic lethal partners and resistance mechanisms.
Proteomics and interactomics
Affinity purification coupled with mass spectrometry (AP-MS) and proximity labeling (BioID) can map the interactome of survivin complex components, revealing dynamic partners in mitosis and apoptosis.
Imaging and live-cell analysis
Fluorescence microscopy of tagged survivin and CPC components allows real-time visualization of complex assembly, spindle localization, and chromosome segregation dynamics.
Transcriptomics and epigenomics
RNA-seq and ChIP-seq after CRISPR perturbations can uncover transcriptional and epigenetic changes driven by survivin complex, including DNA damage response and metabolic pathways.
How CRISPR Can Be Used to Study GO:1990713 survivin complex
Knockout
CRISPR knockout of BIRC5 or other survivin complex genes (e.g., AURKB, CDCA8) in cancer cell lines induces apoptosis, mitotic arrest, and reduced proliferation, validating their essential roles. KO models are used to assess drug sensitivity and synthetic lethality.
Point Mutation
Point mutations in the BIR domain or phosphorylation sites of survivin can be introduced via CRISPR to study dimerization, caspase inhibition, and CPC assembly. Such models help dissect specific residues required for anti-apoptotic function.
Knock-in
Knock-in of fluorescent or epitope tags at the endogenous BIRC5 locus enables real-time tracking of survivin localization and complex formation during mitosis without overexpression artifacts.
Overexpression
CRISPR-mediated overexpression of survivin or its partners (e.g., via safe-harbor integration) models the gain-of-function observed in cancers and can be used to study chemoresistance and metabolic reprogramming.
How EDITGENE Supports survivin complex Research
Researchers studying survivin complex-related genes often need to determine whether a candidate gene is causally involved in apoptosis, mitosis, or cancer progression. EDITGENE provides end-to-end CRISPR services to generate precisely engineered cell models, enabling rigorous functional validation and drug discovery.
Contact EDITGENE today to design your custom CRISPR model for survivin complex research.
Frequently Asked Questions About survivin complex
What is the survivin complex?
The survivin complex (GO:1990713) is a protein complex that negatively regulates apoptosis and contains a baculoviral IAP repeat-containing protein, primarily survivin (BIRC5).
What genes are involved in the survivin complex?
Key genes include BIRC5 (survivin), AURKB, INCENP, and CDCA8 (borealin), which form the chromosomal passenger complex.
What is the function of GO:1990713?
It functions in negative regulation of apoptosis, mitotic chromosome segregation, and spindle assembly.
How is survivin complex related to cancer?
Survivin is overexpressed in many cancers, correlates with poor prognosis, and promotes cell survival and chemoresistance.
What are the synonyms for survivin complex?
Synonyms include Baculoviral IAP repeat-containing protein 5 complex and survivin homodimer complex.
What cellular processes does survivin complex regulate?
It regulates apoptosis, mitosis, cytokinesis, and noncanonical processes like glycolysis and DNA damage response.
How can CRISPR be used to study survivin complex?
CRISPR knockout, point mutation, knock-in, and overexpression models allow precise functional dissection of survivin complex genes.
What diseases are associated with survivin complex dysfunction?
Cancer, mitotic defects, and potentially immune disorders are linked to survivin complex dysregulation.
What are the main protein components of survivin complex?
Survivin homodimer and its interactions with Aurora B, INCENP, and borealin in the CPC.
How is survivin complex regulated?
It is regulated transcriptionally by STAT3, NF-κB, MYC, and post-translationally by phosphorylation, ubiquitination, and HSP90.
Conclusion
The survivin complex (GO:1990713) is a critical regulator of apoptosis and mitosis, with profound implications for cancer biology and therapy. Its dual role in cell survival and division makes it an attractive target for drug discovery and a rich subject for CRISPR-based functional studies. Understanding its assembly, regulation, and noncanonical functions will continue to yield insights into fundamental cell biology and disease mechanisms.
References
- 1. Chandrasekaran V et al.. 2024. Bivalent chromatin accommodates survivin and BRG1/SWI complex to activate DNA damage response in CD4(+) cells.. Cell Commun Signal 22(1):440 PMID: 39261837
- 2. Lens SM et al.. 2003. The survivin/Aurora B complex: its role in coordinating tension and attachment.. Cell Cycle 2(6):507-10 PMID: 14504461
- 3. Siragusa G et al.. 2024. Survivin (BIRC5): Implications in cancer therapy.. Life Sci 350:122788 PMID: 38848940
- 4. Delacour-Larose M et al.. 2008. [Survivin, the starlet of the passenger-protein complex : check-up for its tenth anniversary].. Med Sci (Paris) 24(10):828-32 PMID: 18950578
- 5. Tawara H et al.. 2024. The noncanonical function of borealin, a component of chromosome passenger complex, promotes glycolysis via stabilization of survivin in squamous cell carcinoma cells.. Biochem Biophys Res Commun 706:149741 PMID: 38471204
- 6. Xia F et al.. 2008. A survivin-ran complex regulates spindle formation in tumor cells.. Mol Cell Biol 28(17):5299-311 PMID: 18591255
- 7. Altieri DC. 2015. Survivin - The inconvenient IAP.. Semin Cell Dev Biol 39:91-6 PMID: 25591986
- 8. Jaiswal PK et al.. 2015. Survivin: A molecular biomarker in cancer.. Indian J Med Res 141(4):389-97 PMID: 26112839
