ID   TBA2_CHLRE              Reviewed;         451 AA.
AC   P09205;
DT   01-JUL-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-1989, sequence version 1.
DT   03-AUG-2022, entry version 107.
DE   RecName: Full=Tubulin alpha-2 chain;
GN   Name=TUBA2;
OS   Chlamydomonas reinhardtii (Chlamydomonas smithii).
OC   Eukaryota; Viridiplantae; Chlorophyta; core chlorophytes; Chlorophyceae;
OC   CS clade; Chlamydomonadales; Chlamydomonadaceae; Chlamydomonas.
OX   NCBI_TaxID=3055;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3855249; DOI=10.1128/mcb.5.9.2389-2398.1985;
RA   Silflow C.D., Chisholm R.L., Conner T.W., Ranum L.P.W.;
RT   "The two alpha-tubulin genes of Chlamydomonas reinhardi code for slightly
RT   different proteins.";
RL   Mol. Cell. Biol. 5:2389-2398(1985).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-16.
RX   PubMed=6738533; DOI=10.1128/mcb.4.6.1115-1124.1984;
RA   Brunke K.J., Anthony J.G., Sternberg E.J., Weeks D.P.;
RT   "Repeated consensus sequence and pseudopromoters in the four coordinately
RT   regulated tubulin genes of Chlamydomonas reinhardi.";
RL   Mol. Cell. Biol. 4:1115-1124(1984).
RN   [3]
RP   ACETYLATION AT LYS-40.
RX   PubMed=2441392; DOI=10.1073/pnas.84.16.5720;
RA   Ledizet M., Piperno G.;
RT   "Identification of an acetylation site of Chlamydomonas alpha-tubulin.";
RL   Proc. Natl. Acad. Sci. U.S.A. 84:5720-5724(1987).
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   -!- SIMILARITY: Belongs to the tubulin family. {ECO:0000305}.
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DR   EMBL; M11448; AAA33098.1; -; Genomic_DNA.
DR   EMBL; K01806; AAA33097.1; -; Genomic_DNA.
DR   PIR; B53298; B53298.
DR   AlphaFoldDB; P09205; -.
DR   SMR; P09205; -.
DR   iPTMnet; P09205; -.
DR   ProMEX; P09205; -.
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   1: Evidence at protein level;
KW   Acetylation; Cytoplasm; Cytoskeleton; GTP-binding; Microtubule;
KW   Nucleotide-binding.
FT   CHAIN           1..451
FT                   /note="Tubulin alpha-2 chain"
FT                   /id="PRO_0000048155"
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:0000269|PubMed:2441392"
SQ   SEQUENCE   451 AA;  49585 MW;  1D6E22DD19C962D7 CRC64;
     MREVISIHIG QAGIQVGNAC WELYCLEHGI QPDGQMPSDK TIGGGDDAFN TFFSETGAGK
     HVPRCIFLDL EPTVVDEVRT GTYRQLFHPE QLISGKEDAA NNFARGHYTI GKEIVDLALD
     RIRKLADNCT GLQGFLVFNA VGGGTGSGLG SLLLERLSVD YGKKSKLGFT VYPSPQVSTA
     VVEPYNSVLS THSLLEHTDV AVMLDNEAIY DICRRSLDIE RPTYTNLNRL IAQVISSLTA
     SLRFDGALNV DITEFQTNLV PYPRIHFMLS SYAPIISAEK AYHEQLSVAE ITNAAFEPAS
     MMVKCDPLHG KYMACCLMYR GDVVPKDVNA SVATIKTKRT IQFVDWCPTG FKCGINYQPP
     TVVPGVDLAK VQRAVCMISN STAIGEIFSR LDHKFDLMYA KRAFVHWYVG EGMEEGEFSE
     AREDLAALEK DFEEVGAESA EGAGEGEGEE Y