Q25072 · Q25072_9EUKA

  • Protein
    Tubulin alpha chain
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    2/5

Function

function

Tubulin is the major constituent of microtubules, a cylinder consisting of laterally associated linear protofilaments composed of alpha- and beta-tubulin heterodimers. Microtubules grow by the addition of GTP-tubulin dimers to the microtubule end, where a stabilizing cap forms. Below the cap, tubulin dimers are in GDP-bound state, owing to GTPase activity of alpha-tubulin.

Catalytic activity

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentcytoplasm
Cellular Componentmicrotubule
Molecular FunctionGTP binding
Molecular Functionhydrolase activity
Molecular Functionstructural constituent of cytoskeleton
Biological Processmicrotubule cytoskeleton organization
Biological Processmitotic cell cycle

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Tubulin alpha chain

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Eukaryota > Metamonada > Diplomonadida > Hexamitidae > Hexamitinae > Hexamita

Accessions

  • Primary accession
    Q25072

Subcellular Location

Keywords

Interaction

Subunit

Dimer of alpha and beta chains. A typical microtubule is a hollow water-filled tube with an outer diameter of 25 nm and an inner diameter of 15 nM. Alpha-beta heterodimers associate head-to-tail to form protofilaments running lengthwise along the microtubule wall with the beta-tubulin subunit facing the microtubule plus end conferring a structural polarity. Microtubules usually have 13 protofilaments but different protofilament numbers can be found in some organisms and specialized cells.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain27-224Tubulin/FtsZ GTPase
Domain226-371Tubulin/FtsZ 2-layer sandwich

Sequence similarities

Belongs to the tubulin family.

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    384
  • Mass (Da)
    42,756
  • Last updated
    1996-11-01 v1
  • Checksum
    3D3C755E85EB8654
LFCLEHGIHHDGQMPSDKSVGVSEDSFNTFFSETGAGKHVPRAVFIDLEPTVVDEVRAGAYRQIYHPEQLISGKEDAANNYSRGHNTIGKEVVDLVLDRIRKLADDCSGLQGFMMYHAFGGGTGSGLGSLLLERLSVDYGRKTKLEFVIYPSVHIAVSVVEAYNTVHAAHCMLEHSDCAFMVDNEAMYDICHRNLDIERCTYTNINRIIGQMVSAMTASLRFDGALNVDLTEFQTNLVPYPRVHFPFCSYAPLVSSDKAYHEKLTVAEITNAVFEPANMMVKCDPRHGKYMACCMMYRGDVVPKDVNAAIAVIKTKRTIQFVDWCPTGFKVGINYQPPTVIPGGDLAKVQRACLMISNSTAIAEVWSRTDKNFDLMFAKRAFVH

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue384

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
U37080
EMBL· GenBank· DDBJ
AAC47085.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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