ID   TBA_TRYBR               Reviewed;         451 AA.
AC   P04106;
DT   01-NOV-1986, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1986, sequence version 1.
DT   03-AUG-2022, entry version 115.
DE   RecName: Full=Tubulin alpha chain;
OS   Trypanosoma brucei rhodesiense.
OC   Eukaryota; Discoba; Euglenozoa; Kinetoplastea; Metakinetoplastina;
OC   Trypanosomatida; Trypanosomatidae; Trypanosoma.
OX   NCBI_TaxID=31286;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=4043732; DOI=10.1016/0378-1119(85)90002-2;
RA   Kimmel B.E., Samson S., Wu J., Hirschberg R., Yarbrough L.R.;
RT   "Tubulin genes of the African trypanosome Trypanosoma brucei rhodesiense:
RT   nucleotide sequence of a 3.7-kb fragment containing genes for alpha and
RT   beta tubulins.";
RL   Gene 35:237-248(1985).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-8 AND 442-451.
RX   PubMed=2994042; DOI=10.1073/pnas.82.17.5695;
RA   Sather S., Agabian N.;
RT   "A 5' spliced leader is added in trans to both alpha- and beta-tubulin
RT   transcripts in Trypanosoma brucei.";
RL   Proc. Natl. Acad. Sci. U.S.A. 82:5695-5699(1985).
CC   -!- FUNCTION: Tubulin is the major constituent of microtubules. It binds
CC       two moles of GTP, one at an exchangeable site on the beta chain and one
CC       at a non-exchangeable site on the alpha chain.
CC   -!- SUBUNIT: Dimer of alpha and beta chains. A typical microtubule is a
CC       hollow water-filled tube with an outer diameter of 25 nm and an inner
CC       diameter of 15 nM. Alpha-beta heterodimers associate head-to-tail to
CC       form protofilaments running lengthwise along the microtubule wall with
CC       the beta-tubulin subunit facing the microtubule plus end conferring a
CC       structural polarity. Microtubules usually have 13 protofilaments but
CC       different protofilament numbers can be found in some organisms and
CC       specialized cells.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm, cytoskeleton.
CC   -!- PTM: Undergoes a tyrosination/detyrosination cycle, the cyclic removal
CC       and re-addition of a C-terminal tyrosine residue by the enzymes tubulin
CC       tyrosine carboxypeptidase (TTCP) and tubulin tyrosine ligase (TTL),
CC       respectively. {ECO:0000250}.
CC   -!- PTM: Acetylation of alpha chains at Lys-40 stabilizes microtubules and
CC       affects affinity and processivity of microtubule motors. This
CC       modification has a role in multiple cellular functions, ranging from
CC       cell motility, cell cycle progression or cell differentiation to
CC       intracellular trafficking and signaling (By similarity). {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the tubulin family. {ECO:0000305}.
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DR   EMBL; K02836; AAA30262.1; -; Genomic_DNA.
DR   EMBL; M11747; AAA30266.1; -; Genomic_DNA.
DR   EMBL; M11748; AAA30267.1; -; Genomic_DNA.
DR   PIR; A02970; UBUTA.
DR   AlphaFoldDB; P04106; -.
DR   SMR; P04106; -.
DR   PRIDE; P04106; -.
DR   ABCD; P04106; 1 sequenced antibody.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-KW.
DR   GO; GO:0005874; C:microtubule; IEA:UniProtKB-KW.
DR   GO; GO:0005525; F:GTP binding; IEA:UniProtKB-KW.
DR   GO; GO:0005200; F:structural constituent of cytoskeleton; IEA:InterPro.
DR   GO; GO:0007017; P:microtubule-based process; IEA:InterPro.
DR   Gene3D; 1.10.287.600; -; 1.
DR   Gene3D; 3.30.1330.20; -; 1.
DR   Gene3D; 3.40.50.1440; -; 1.
DR   InterPro; IPR002452; Alpha_tubulin.
DR   InterPro; IPR008280; Tub_FtsZ_C.
DR   InterPro; IPR000217; Tubulin.
DR   InterPro; IPR037103; Tubulin/FtsZ-like_C.
DR   InterPro; IPR018316; Tubulin/FtsZ_2-layer-sand-dom.
DR   InterPro; IPR036525; Tubulin/FtsZ_GTPase_sf.
DR   InterPro; IPR023123; Tubulin_C.
DR   InterPro; IPR017975; Tubulin_CS.
DR   InterPro; IPR003008; Tubulin_FtsZ_GTPase.
DR   PANTHER; PTHR11588; PTHR11588; 1.
DR   Pfam; PF00091; Tubulin; 1.
DR   Pfam; PF03953; Tubulin_C; 1.
DR   PRINTS; PR01162; ALPHATUBULIN.
DR   PRINTS; PR01161; TUBULIN.
DR   SMART; SM00864; Tubulin; 1.
DR   SMART; SM00865; Tubulin_C; 1.
DR   SUPFAM; SSF52490; SSF52490; 1.
DR   SUPFAM; SSF55307; SSF55307; 1.
DR   PROSITE; PS00227; TUBULIN; 1.
PE   3: Inferred from homology;
KW   Acetylation; Cytoplasm; Cytoskeleton; GTP-binding; Microtubule;
KW   Nucleotide-binding.
FT   CHAIN           1..451
FT                   /note="Tubulin alpha chain"
FT                   /id="PRO_0000048234"
FT   BINDING         142..148
FT                   /ligand="GTP"
FT                   /ligand_id="ChEBI:CHEBI:37565"
FT                   /evidence="ECO:0000255"
FT   SITE            451
FT                   /note="Involved in polymerization"
FT   MOD_RES         40
FT                   /note="N6-acetyllysine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   451 AA;  49787 MW;  68BF6E3EFED70D72 CRC64;
     MREAICIHIG QAGCQVGNAC WELFCLEHGI QPDGAMPSDK TIGVEDDAFN TFFSETGAGK
     HVPRAVFLDL EPTVVDEVRT GTYRQLFHPE QLISGKEDAA NNYARGHYTI GKEIVDLCLD
     RIRKLADNCT GLQGFLVYHA VGGGTGSGLG ALLLERLSVD YGKKSKLGYT VYPSPQVSTA
     VVEPYNSVLS THSLLEHTDV AAMLDNEAIY DLTRRNLDIE RPTYTNLNRL IGQVVSSLTA
     SLRFDGALNV DLTEFQTNLV PYPRIHFVLT SYAPVISAEK AYHEQLSVSE ISNAVFEPAS
     MMTKCDPRHG KYMACCLMYR GDVVPKDVNA AVATIKTKRT IQFVDWSPTG FKCGINYQPP
     TVVPGGDLAK VQRAVCMIAN STAIAEVFAR IDHKFDLMYS KRAFVHWYVG EGMEEGEFSE
     AREDLAALEK DYEEVGAESA DMDGEEDVEE Y