Biology:MAP4
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Microtubule-associated protein 4 is a protein that in humans is encoded by the MAP4 gene.[1]
The protein encoded by this gene is a major non-neuronal microtubule-associated protein. This protein contains a domain similar to the microtubule-binding domains of neuronal microtubule-associated protein (MAP2) and microtubule-associated protein tau (MAPT/TAU). This protein promotes microtubule assembly, and has been shown to counteract destabilization of interphase microtubule catastrophe promotion. Cyclin B was found to interact with this protein, which targets cell division cycle 2 (CDC2) kinase to microtubules. The phosphorylation of this protein affects microtubule properties and cell cycle progression. Multiple alternatively spliced transcript variants encoding distinct isoforms have been observed, the full-length nature of three of which are supported.[2] uMAP4, the ubiquitous isoform of MAP4, functions in the architecture and positioning of the mitotic spindle in human cells.[3] oMAP4 is predominantly expressed in brain and muscle and has been shown to organise microtubules into antiparallel bundles.[4] mMAP4 is a muscle-specific isoform.[4][5]
References
- ↑ "Non-neuronal 210 x 10(3) Mr microtubule-associated protein (MAP4) contains a domain homologous to the microtubule-binding domains of neuronal MAP2 and tau". J Cell Sci. 98 ( Pt 1): 27–36. Jul 1991. doi:10.1242/jcs.98.1.27. PMID 1905296.
- ↑ "Entrez Gene: MAP4 microtubule-associated protein 4". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=4134.
- ↑ Samora, Catarina P.; Mogessie, Binyam; Conway, Leslie; Ross, Jennifer L.; Straube, Anne; McAinsh, Andrew D. (7 August 2011). "MAP4 and CLASP1 operate as a safety mechanism to maintain a stable spindle position in mitosis". Nature Cell Biology 13 (9): 1040–1050. doi:10.1038/ncb2297. PMID 21822276.
- ↑ 4.0 4.1 Mogessie, Binyam; Roth, Daniel; Rahil, Zainab; Straube, Anne (21 April 2015). "A novel isoform of MAP4 organises the paraxial microtubule array required for muscle cell differentiation". eLife 4: e05697. doi:10.7554/eLife.05697. PMID 25898002.
- ↑ Casey, LM; Lyon, HD; Olmsted, JB (April 2003). "Muscle-specific microtubule-associated protein 4 is expressed early in myogenesis and is not sufficient to induce microtubule reorganization.". Cell Motility and the Cytoskeleton 54 (4): 317–36. doi:10.1002/cm.10105. PMID 12601693.
Further reading
- "Microtubule stabilization by assembly-promoting microtubule-associated proteins: a repeat performance.". Cell Motil. Cytoskeleton 23 (4): 236–43. 1993. doi:10.1002/cm.970230403. PMID 1477887.
- "A model for microtubule-associated protein 4 structure. Domains defined by comparisons of human, mouse, and bovine sequences.". J. Biol. Chem. 266 (32): 21886–96. 1991. doi:10.1016/S0021-9258(18)54720-7. PMID 1718985.
- "Differential expression of alternatively spliced forms of MAP4: a repertoire of structurally different microtubule-binding domains.". Biochemistry 34 (7): 2289–301. 1995. doi:10.1021/bi00007a025. PMID 7857940.
- "Cyclin B interaction with microtubule-associated protein 4 (MAP4) targets p34cdc2 kinase to microtubules and is a potential regulator of M-phase microtubule dynamics.". J. Cell Biol. 128 (5): 849–62. 1995. doi:10.1083/jcb.128.5.849. PMID 7876309.
- "Cellular microtubules heterogeneous in their content of microtubule-associated protein 4 (MAP4).". Cell Motil. Cytoskeleton 27 (2): 133–49. 1994. doi:10.1002/cm.970270205. PMID 7909279.
- "A "double adaptor" method for improved shotgun library construction.". Anal. Biochem. 236 (1): 107–13. 1996. doi:10.1006/abio.1996.0138. PMID 8619474.
- "Phosphorylation of microtubule-associated proteins MAP2 and MAP4 by the protein kinase p110mark. Phosphorylation sites and regulation of microtubule dynamics.". J. Biol. Chem. 271 (18): 10834–43. 1996. doi:10.1074/jbc.271.18.10834. PMID 8631898.
- "Large-scale concatenation cDNA sequencing.". Genome Res. 7 (4): 353–8. 1997. doi:10.1101/gr.7.4.353. PMID 9110174.
- "Overexpression of MAP4 inhibits organelle motility and trafficking in vivo.". J. Cell Sci.. 110 ( Pt 24) (24): 3055–64. 1998. doi:10.1242/jcs.110.24.3055. PMID 9365275.
- "MAP4 is the in vivo substrate for CDC2 kinase in HeLa cells: identification of an M-phase specific and a cell cycle-independent phosphorylation site in MAP4.". Biochemistry 36 (50): 15873–83. 1998. doi:10.1021/bi971251w. PMID 9398320.
- "Microtubule-associated protein 4 (MAP4) regulates assembly, protomer-polymer partitioning and synthesis of tubulin in cultured cells.". J. Cell Sci.. 112 ( Pt 12) (12): 1813–24. 1999. doi:10.1242/jcs.112.12.1813. PMID 10341201.
- "Phosphorylation of MAP2c and MAP4 by MARK kinases leads to the destabilization of microtubules in cells.". Cell Motil. Cytoskeleton 44 (3): 209–24. 2000. doi:10.1002/(SICI)1097-0169(199911)44:3<209::AID-CM6>3.0.CO;2-4. PMID 10542369.
- "Ser787 in the proline-rich region of human MAP4 is a critical phosphorylation site that reduces its activity to promote tubulin polymerization.". Cell Struct. Funct. 25 (1): 33–9. 2000. doi:10.1247/csf.25.33. PMID 10791892.
- "Phosphorylation of MAP4 affects microtubule properties and cell cycle progression.". J. Cell Sci. 114 (Pt 15): 2879–87. 2002. doi:10.1242/jcs.114.15.2879. PMID 11683421.
- "The projection domain of MAP4 suppresses the microtubule-bundling activity of the microtubule-binding domain.". J. Mol. Biol. 320 (1): 97–106. 2002. doi:10.1016/S0022-2836(02)00402-3. PMID 12079337.
- "MAP4 counteracts microtubule catastrophe promotion but not tubulin-sequestering activity in intact cells.". Curr. Biol. 12 (12): 1034–9. 2002. doi:10.1016/S0960-9822(02)00897-7. PMID 12123579.
- "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. 2003. doi:10.1073/pnas.242603899. PMID 12477932. Bibcode: 2002PNAS...9916899M.
- "The number of repeat sequences in microtubule-associated protein 4 affects the microtubule surface properties.". J. Biol. Chem. 278 (32): 29609–18. 2003. doi:10.1074/jbc.M302186200. PMID 12773533.
- "The gene for microtubule-associated protein 4 (Mtap4) maps to the distal region of mouse chromosome 9". Mamm. Genome 7 (12): 918–19. 1996. doi:10.1007/s003359900270. PMID 8995766.
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