Function

Stathmin-4 (STM-4) regulates microtubules dynamics. Microtubules undergo continuous assembly and disassembly in the cell’s cytoskeleton. STM-4 binds to tubulin and prevents the latter from polymerization thus preventing microtubule assembly. Phosphorylation of STM-4 weakens the binding of STM-4 to tubulin enabling the microtubule assembly needed for the formation of mitotic spindle. Thus, STM-4 is an oncoprotein. STM-4 contains an SLD (Stathmin-Like Domain) domain of 149 residues which binds the tubulin dimer[1].

Disease

Decreased levels of STM-4 are found in brains of adults with Down syndrome and Alzheimer disease[2].

3D Structures of stathmin-4

Stathmin-4 3D structures


Rat stathmin SLD domain (magenta) complex with tubulin α chain (grey, pink), tubulin β chain (green, yellow), GTP, sulfate and Mg+2 ions (PDB code 3ryf)

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3D Structures of stathmin-43D Structures of stathmin-4

Updated on 10-February-2020 {{#tree:id=OrganizedByTopic|openlevels=0|

  • Stathmin SLD domain complex with tubulin
    • 3ryf – rSTM + tubulin + GTP - rat
    • 3hkb, 3ryc, 3ryi – rSTM + tubulin + GTP + GDP
    • 3ryh – rSTM + tubulin + GTP + phosphomethylphosphonic acid guanylate
    • 3hkc, 3n2g, 3n2k – rSTM + tubulin + GTP + GDP + pyridine derivative
    • 3hkd – rSTM + tubulin + GTP + GDP + pyrrolidine derivative
    • 3hke – rSTM + tubulin + GTP + GDP + benzenesulfonamide derivative
    • 6h9b – rSTM + tubulin + GTP + GDP + quinoline derivative
  • Stathmin SLD domain complex with tubulin and drugs
    • 1sa0 – rSTM + tubulin + GTP + GDP + anti-gout drug
    • 1sa1, 1z2b – rSTM + tubulin + GTP + GDP + anti-wart drug
    • 4eb6, 5j2u – rSTM (mutant) + tubulin + GTP + GDP + anti-cancer drug
    • 3du7 – rSTM + tubulin + GTP + GDP + phomopsine + anti-gout drug
    • 3e22 – rSTM + tubulin + GTP + GDP + soblidotine + anti-gout drug
    • 5lp6, 5kx5 – rSTM + tubulin + GTP + GDP + drug
    • 3ut5 – rSTM (mutant) + tubulin + GTP + GDP + ustiloxine + anti-gout drug + Vinca tetrapeptide
  • Stathmin SLD domain complex with tubulin and tubulin tyrosine ligase
    • 4iij – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP
    • 4ihj – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP + ADP
    • 5jqg, 6i5c, 4i55, 5xp3, 6jcj, [[6gze] – rSTM-4 + tubulin + tubulin tyrosine ligase + GTP + GDP + ATP derivative
    • 5yl2, 5ylj, 5yls, 6br1, 6brf, 6bry, 6bs2, 6d88, 6fkj, 6fkl, 5o7a – rSTM-4 + tubulin + tubulin tyrosine ligase + GTP + GDP + ATP derivative + inhibitor
    • 5ov7 – rSTM + tubulin + protein + GTP + GDP + ACP + inhibitor
    • 5xkf – rSTM-4 + tubulin + tubulin tyrosine ligase + GTP + GDP + inhibitor
    • 4o2a, 6k9vj, 6o5m, 6o5n, 6o61, 6qqn, 6agk, 5z4u, 5z4p, 5xi7, 5xi5, 5xhc, 5h7o, 6qtn – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP + ADP + inhibitor
    • 6hx8, 6eg5 – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP + quinoline derivative
    • 5lov, 5njh – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP + ATP derivative + azoamide
    • 5lxs, 5lxt – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP + ATP derivative + discodermolide
    • 5lyj, 5mf4 – rSTM + tubulin + tubulin tyrosine ligase + GTP + GDP + ATP derivative + natural product
  • Stathmin SLD domain complex with tubulin, tubulin tyrosine ligase and drug

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ReferencesReferences

  1. Curmi PA, Gavet O, Charbaut E, Ozon S, Lachkar-Colmerauer S, Manceau V, Siavoshian S, Maucuer A, Sobel A. Stathmin and its phosphoprotein family: general properties, biochemical and functional interaction with tubulin. Cell Struct Funct. 1999 Oct;24(5):345-57. PMID:15216892
  2. Cheon MS, Fountoulakis M, Cairns NJ, Dierssen M, Herkner K, Lubec G. Decreased protein levels of stathmin in adult brains with Down syndrome and Alzheimer's disease. J Neural Transm Suppl. 2001;(61):281-8. PMID:11771751

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