gene

C4B

Entity Detail — Knowledge Graph Node

Understanding Entity Pages

This page aggregates everything SciDEX knows about C4B: its mechanistic relationships (Knowledge Graph edges), hypotheses targeting it, analyses mentioning it, and supporting scientific papers. The interactive graph below shows its immediate neighbors. All content is AI-synthesized from peer-reviewed literature.

202Connections
1Hypotheses
1Analyses
50Outgoing
50Incoming

Summary

Complement component C4B gene - role in immune function, neuroinflammation, and connection to neurodegenerative and autoimmune diseases

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🧬 Gene Info
Gene SymbolC4B
Full NameComplement Component 4B (Chido/Rodgers Blood Group)
AliasesComplement component C4B gene
Chromosome6p21.3
Target ClassProtein
Functionencodes a crucial protein in the complement cascade, sharing significant sequence similarity with its close relative C4A while exhibiting distinct biochemical properties and disease associations.
Mechanism of ActionPrioritized from 1 SciDEX hypotheses, including: Age-Dependent Complement C4b Upregulation Drives Synaptic Vulnerability in Hippocampal CA1 Neurons
DruggabilityMedium (0.50)
Clinical StagePhase I
Molecular Weight104 kDa
Amino Acids1741 aa
PathwaysComplement
UniProt IDP0C0S0
NCBI Gene ID713
Ensembl IDENSG00000244731
OMIM120820
GeneCardsC4B
Human Protein AtlasC4B
Associated DiseasesALS, Aging, Alzheimer, neurodegeneration
InteractionsC1Q, C3, IFNAR1, TREM2, CD55, CD59
SciDEX TargetView Target Profile
SciDEX HypothesesAge-Dependent Complement C4b Upregulation Drives S
KG Connections202 knowledge graph edges
DatabasesGeneCardsHPASTRING
🔮 Predicted Structure: C4B — AlphaFold P0C0S0 Click to expand

AI-predicted structure from AlphaFold | Powered by Mol*

Wiki Pages (21)

Knowledge base pages for this entity

Canonical Page

C4B Gene

gene · 1977 words

CR1 Gene — Complement Component 1q Receptor

gene · 3403 words

Aging vs Neurodegeneration: Mechanistic Comparison Matrix

mechanism · 3330 words

microglial-synaptic-pruning-dysregulation

mechanism · 3254 words

Complement System in Neurodegeneration

mechanism · 3221 words

Neuromyelitis Optica Spectrum Disorder (NMOSD)

disease · 3198 words

Pathway Diagram

graph TD
    C4B["<b>C4B</b>"]
    Alzheimer{"Alzheimer"}
    C4B -->|"associated with"| Alzheimer
    Ms{"Ms"}
    C4B -->|"expressed in"| Ms
    Schizophrenia{"Schizophrenia"}
    C4B -->|"expressed in"| Schizophrenia
    Als{"Als"}
    C4B -->|"expressed in"| Als
    C4B -->|"associated with"| Als
    Tumor{"Tumor"}
    C4B -->|"regulates"| Tumor
    Inflammation{"Inflammation"}
    C4B -->|"expressed in"| Inflammation
    ALS{"ALS"}
    C4B -->|"expressed in"| ALS
    Complement(["Complement"])
    C4B -->|"expressed in"| Complement
    JUN["JUN"]
    C4B -->|"associated with"| JUN
    TREM2["TREM2"]
    C4B -->|"associated with"| TREM2
    GENES["GENES"]
    C4B -->|"expressed in"| GENES
    JUN -->|"associated with"| C4B
    TREM2 -->|"associated with"| C4B
    C4A["C4A"]
    C4A -->|"expressed in"| C4B
    COMPLEMENT["COMPLEMENT"]
    COMPLEMENT -->|"regulates"| C4B
    CYTOKINES["CYTOKINES"]
    CYTOKINES -->|"activates"| C4B
    TNF["TNF"]
    TNF -->|"expressed in"| C4B
    INFLAMMATION["INFLAMMATION"]
    INFLAMMATION -->|"expressed in"| C4B
    IL_6["IL-6"]
    IL_6 -->|"activates"| C4B
    DISEASE_ASSOCIATED_MICROGLIA["DISEASE-ASSOCIATED MICROGLIA"]
    DISEASE_ASSOCIATED_MICROGLIA -->|"associated with"| C4B
    ALZHEIMER_S_DISEASE["ALZHEIMER'S DISEASE"]
    ALZHEIMER_S_DISEASE -->|"associated with"| C4B
    MICROGLIA["MICROGLIA"]
    MICROGLIA -->|"associated with"| C4B
    ALZHEIMER["ALZHEIMER"]
    ALZHEIMER -->|"associated with"| C4B
    style C4B fill:#1a3a4a,stroke:#4fc3f7,stroke-width:3px,color:#e0e0e0

Outgoing (123)

TargetRelationTypeStr
COMPLEMENT_CASCADEcomponent_ofpathway0.95
SYNAPTIC_PRUNINGmediatesprocess0.90
C1QApathway_partnergene0.90
C3activatesgene0.90
SCHIZOPHRENIArisk_gene_fordisease0.90

Incoming (79)

SourceRelationTypeStr
h-2f43b42ftargets_genehypothesis0.90
JUNassociated_withgene0.60
TREM2associated_withgene0.60
C4Aexpressed_ingene0.60
TNFexpressed_ingene0.60

Targeting Hypotheses (1)

Hypotheses where this entity is a therapeutic target

HypothesisScoreDiseaseAnalysis
Age-Dependent Complement C4b Upregulation Drives Synaptic Vu 0.470 neurodegeneration Gene expression changes in aging mouse b

Mentioning Analyses (1)

Scientific analyses that reference this entity

Gene expression changes in aging mouse brain predicting neurodegenerative vulner

neurodegeneration | 2026-04-03 | 34 hypotheses Top: 0.692

Related Papers (20)

Scientific publications cited in analyses involving this entity

Title & PMIDAuthorsJournalYearCitations
Human and mouse single-nucleus transcriptomics reveal TREM2-dependent and TREM2- [PMID:31932797] Zhou Y, Song WM, Andhey PS, Swain A, Lev Nat Med 2020 1
Repurposing of doxycycline as a novel therapeutic avenue for management of parki [PMID:41925933] Ali NH, Al-Kuraishy HM, Hussain NR, Al-G Inflammopharmacology 2026 0
Histological findings in follow-up liver biopsies up to 15 years after pediatric [PMID:41370831] Quintero-Bernabeu J, Salcedo-Allende MT, Liver Transpl 2026 0
Protein Corona Reprograms Hepatic Clearance Pathways of Biomimetic Nanoparticles [PMID:41944292] He T, Fang X, Zhu L, Fan H, Qiu Y et al. Small 2026 0
Mid-Term Comparison of N-Butyl Cyanoacrylate, Endovenous Laser Ablation, and Rad [PMID:41964281] Dilek I, Kocaoglu AS, Büyükceran EU, Nay Vasc Endovascular Surg 2026 0
Knee Osteoarthritis as a Causal Risk Factor for Parkinson's Disease: Converging [PMID:41925436] Peng Z, Wang G The American journal of geriat 2026 0
Reactive astrocyte subpopulations with high Gfap and C4b expression in different [PMID:41837502] Huang C, Han Y, He J, Ma W, Chen Y, Dong Neural regeneration research 2026 0
Longitudinal investigation of the T helper (Th)1-Th2 balance and complement syst [PMID:41872173] Zhang T, Zhao J, Tang X, Wei Y, Ju M, Zh Translational psychiatry 2026 0
Global C3 lowering in adulthood protects against hippocampal dysfunction and cog [PMID:40678242] ["Batista A", "Presumey J", "Singh B", " Research square 2025 0
Diverse cell types establish a pathogenic immune environment in peripheral neuro [PMID:40410792] ["Choi J", "Strickland A", "Loo H", "Don Journal of neuroinflammation 2025 0
Alzheimer's disease clinical variants show distinct neuroinflammatory profiles w [PMID:39400356] ["Boon B", "Frigerio I", "de Gooijer D", Neuropathology and applied neu 2024 0
TREM2 receptor protects against complement-mediated synaptic loss by binding to [PMID:37442133] Zhong L, Sheng X, Wang W, Li Y, Zhuo R, Immunity 2023 0
[WALANT - Wide Awake Local Anaesthesia No Tourniquet: Complications in elective [PMID:35168268] Wieschollek S, Forster S, Megerle K Handchirurgie, Mikrochirurgie, 2022 0
Loss of microglial SIRPα promotes synaptic pruning in preclinical models of neur [PMID:33795678] Ding X, Wang J, Huang M, Chen Z, Liu J, Nature communications 2021 0
Adaptive learning algorithms to optimize mobile applications for behavioral heal [PMID:33657217] Figueroa CA, Aguilera A, Chakraborty B, Journal of the American Medica 2021 0
Engineering complex communities by directed evolution. [PMID:33986540] Chang CY, Vila JCC, Bender M, Li R, Mank Nature ecology & evolution 2021 0
A Novel N-terminal Region to Chromodomain in CHD7 is Required for the Efficient [PMID:34161779] Lee E, Kang C, Purhonen P, Hebert H, Bou Journal of molecular biology 2021 0
A distributional code for value in dopamine-based reinforcement learning. [PMID:31942076] Dabney W, Kurth-Nelson Z, Uchida N, Star Nature 2020 0
PDK1 Mediates NOTCH1-Mutated Head and Neck Squamous Carcinoma Vulnerability to T [PMID:30770351] Sambandam V, Frederick MJ, Shen L, Tong Clinical cancer research : an 2019 0
TREM2 triggers microglial density and age-related neuronal loss. [PMID:30548312] Linnartz-Gerlach B, Bodea LG, Klaus C, G Glia 2019 0