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Aliases MAP1B, FUTSCH, MAP5, PPP1R102, microtubule-associated protein 1B, microtubule associated protein 1B
External IDs MGI: 1306778 HomoloGene: 38111 GeneCards: MAP1B
Gene location (Human)
Chromosome 5 (human)
Chr. Chromosome 5 (human)[1]
Chromosome 5 (human)
Genomic location for MAP1B
Genomic location for MAP1B
Band 5q13.2 Start 72,107,234 bp[1]
End 72,209,570 bp[1]
RNA expression pattern
PBB GE MAP1B 214577 at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 5: 72.11 – 72.21 Mb Chr 13: 99.42 – 99.52 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse

Microtubule-associated protein 1B is a protein that in humans is encoded by the MAP1B gene.[5][6]


This gene encodes a protein that belongs to the microtubule-associated protein family. The proteins of this family are thought to be involved in microtubule assembly, which is an essential step in neurogenesis. The product of this gene is a precursor polypeptide that presumably undergoes proteolytic processing to generate the final MAP1B heavy chain and LC1 light chain. Gene knockout studies of the mouse microtubule-associated protein 1B gene suggested an important role in development and function of the nervous system. Two alternatively spliced transcript variants have been described.[6]


MAP1B has been shown to interact with Acidic leucine-rich nuclear phosphoprotein 32 family member A[7] and RASSF1.[8]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000131711 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000052727 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ Lien LL, Boyce FM, Kleyn P, Brzustowicz LM, Menninger J, Ward DC, Gilliam TC, Kunkel LM (Oct 1991). "Mapping of human microtubule-associated protein 1B in proximity to the spinal muscular atrophy locus at 5q13". Proc. Natl. Acad. Sci. U.S.A. 88 (17): 7873–6. doi:10.1073/pnas.88.17.7873. PMC 52406Freely accessible. PMID 1881920. 
  6. ^ a b "Entrez Gene: MAP1B microtubule-associated protein 1B". 
  7. ^ Opal P, Garcia JJ, Propst F, Matilla A, Orr HT, Zoghbi HY (Sep 2003). "Mapmodulin/leucine-rich acidic nuclear protein binds the light chain of microtubule-associated protein 1B and modulates neuritogenesis". J. Biol. Chem. 278 (36): 34691–9. doi:10.1074/jbc.M302785200. PMID 12807913. 
  8. ^ Dallol A, Agathanggelou A, Fenton SL, Ahmed-Choudhury J, Hesson L, Vos MD, Clark GJ, Downward J, Maher ER, Latif F (Jun 2004). "RASSF1A interacts with microtubule-associated proteins and modulates microtubule dynamics". Cancer Res. 64 (12): 4112–6. doi:10.1158/0008-5472.CAN-04-0267. PMID 15205320. 

Further reading[edit]