Structural Classification of Proteins
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Fold: 4-helical cytokines

core: 4 helices; bundle, closed; left-handed twist; 2 crossover connections

Lineage:

  1. Root: scop
  2. Class: All alpha proteins [46456]
  3. Fold: 4-helical cytokines [47265]
    core: 4 helices; bundle, closed; left-handed twist; 2 crossover connections

Superfamilies:

  1. 4-helical cytokines [47266] (3)
    there are two different topoisomers of this fold with different entanglements of the two crossover connections
    link to SUPERFAMILY database - Superfamily
    1. Long-chain cytokines [47267] (14)
      1. Granulocyte-colony stimulating factor (G-CSF) [47268]
        1. Human (Homo sapiens) [TaxId: 9606] [47269] (5) picpic
        2. Cow (Bos taurus) [TaxId: 9913] [47270] (1) picpic
        3. Dog (Canis familiaris) [TaxId: 9615] [47271] (2) picpic
      2. Interleukin-6 [47272]
        1. Human (Homo sapiens) [TaxId: 9606] [47273] (4) picpic
        2. Human herpesvirus 8, Kaposi's sarcoma herpes-virus [TaxId: 37296] [63528] (1) picpic
      3. Leukemia inhibitory factor (LIF) [47274]
        1. Mouse (Mus musculus) [TaxId: 10090] [47275] (2) picpic
        2. Human (Homo sapiens) [TaxId: 9606] [63529] (4) picpic
      4. Growth hormone, somatotropin [47276]
        1. Human (Homo sapiens) [TaxId: 9606] [47277] (9) picpic
      5. Prolactin (placental lactogen) [47278]
        1. Sheep (Ovis aries) [TaxId: 9940] [47279] (1) picpic
        2. Human (Homo sapiens) [TaxId: 9606] [89035] (2) picpic
      6. Ciliary neurotrophic factor (CNTF) [47280]
        1. Human (Homo sapiens) [TaxId: 9606] [47281] (1) picpic
      7. Leptin (obesity protein) [47282]
        1. Human (Homo sapiens) [TaxId: 9606] [47283] (1) picpic
      8. Oncostatin M [47284]
        1. Human (Homo sapiens) [TaxId: 9606] [47285] (1) picpic
      9. Heterodimeric interleukin-12 alpha chain [63530]
        1. Human (Homo sapiens) [TaxId: 9606] [63531] (1) picpic
    2. Short-chain cytokines [47286] (14)
      1. Erythropoietin [47287]
        long chain cytokine with a short-chain cytokine topology
        1. Human (Homo sapiens) [TaxId: 9606] [47288] (3) picpic
      2. Thrombopoietin [101140]
        long chain cytokine with a short-chain cytokine topology
        1. Human (Homo sapiens) [TaxId: 9606] [101141] (2) picpic
      3. Granulocyte-macrophage colony-stimulating factor (GM-CSF) [47289]
        1. Human (Homo sapiens) [TaxId: 9606] [47290] (3) picpic
      4. Interleukin-4 (IL-4) [47291]
        1. Human (Homo sapiens) [TaxId: 9606] [47292] (16) picpic
      5. Interleukin-5 [47293]
        intertwined dimer
        1. Human (Homo sapiens) [TaxId: 9606] [47294] (1) picpic
      6. Macrophage colony-stimulating factor (M-CSF) [47295]
        forms dimer similar to the Flt3 ligand and SCF dimers
        1. Human (Homo sapiens) [TaxId: 9606] [47296] (1) picpic
      7. Flt3 ligand [47297]
        forms dimer similar to the M-CSF and SCF dimers
        1. Human (Homo sapiens) [TaxId: 9606] [47298] (1) picpic
      8. Stem cell factor, SCF [47299]
        forms dimer similar to the M-CSF and Flt3 ligand dimers
        1. Human (Homo sapiens) [TaxId: 9606] [47300] (3) picpic
      9. Interleukin-2 (IL-2) [47301]
        1. Human (Homo sapiens) [TaxId: 9606] [47302] (15) picpic
      10. Interleukin-3 (IL-3) [47303]
        1. Human (Homo sapiens) [TaxId: 9606] [47304] (1) picpic
      11. Interleukin-13 (IL-13) [63532]
        1. Human (Homo sapiens) [TaxId: 9606] [63533] (3) picpic
      12. Interleukin-15 (IL-15) [158422]
        1. Human (Homo sapiens) [TaxId: 9606] [158423] (10) picpic
          SQ P40933 49-162
        2. Mouse (Mus musculus) [TaxId: 10090] [158424] (2) picpic
          SQ P48346 49-162
      13. Interleukin-21 (IL-21) [158425]
        1. Human (Homo sapiens) [TaxId: 9606] [158426] (1) picpic
          SQ Q9HBE4 23-155
    3. Interferons/interleukin-10 (IL-10) [47305] (13)
      contains an additional helix in one of the crossover connections
      1. Interleukin-10 (cytokine synthesis inhibitory factor, CSIF) [47306]
        intertwined dimer, similar to interferon-gamma
        1. Human (Homo sapiens) [TaxId: 9606] [47307] (7) picpic
        2. Epstein-Barr virus [TaxId: 10376] [47308] (3) picpic
        3. Human herpesvirus 5 [TaxId: 10359] [74708] (1) picpic
      2. Interleukin-19 [81744]
        1. Human (Homo sapiens) [TaxId: 9606] [81745] (1) picpic
      3. Interferon-beta [47309]
        1. Human (Homo sapiens) [TaxId: 9606] [47310] (1) picpic
        2. Mouse (Mus musculus) [TaxId: 10090] [47311] (2) picpic
          SQ P01575 22-182
          CA-atoms only
      4. Interleukin-22 (IL-22) [89036]
        1. Human (Homo sapiens) [TaxId: 9606] [89037] (8) picpic
      5. Interferon-alpha 2b [47312]
        1. Human (Homo sapiens) [TaxId: 9606] [47313] (1) picpic
      6. Interferon-alpha 2a [47314]
        1. Human (Homo sapiens) [TaxId: 9606] [47315] (2) picpic
      7. Interferon-tau [47316]
        1. Sheep (Ovis aries) [TaxId: 9940] [47317] (1) picpic
      8. Interferon-gamma [47318]
        intertwined dimer
        1. Cow (Bos taurus) [TaxId: 9913] [47319] (3) picpic
        2. Human (Homo sapiens) [TaxId: 9606] [47320] (5) picpic
        3. Rabbit (Oryctolagus cuniculus) [TaxId: 9986] [47321] (1) picpic
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MRC site Generated from scop database 1.75 with scopm 1.101 on Wed Jun 3 10:42:06 2009
Copyright © 1994-2009 The scop authors / scop@mrc-lmb.cam.ac.uk