ID A0A4I7_9EUKA Unreviewed; 378 AA.
AC A0A4I7;
DT 14-NOV-2006, integrated into UniProtKB/TrEMBL.
DT 14-NOV-2006, sequence version 1.
DT 27-MAR-2024, entry version 65.
DE RecName: Full=Tubulin alpha chain {ECO:0000256|RuleBase:RU000352};
DE Flags: Fragment;
OS Chrysochromulina sp. NIES-1333.
OC Eukaryota; Haptista; Haptophyta; Prymnesiophyceae; Prymnesiales;
OC Chrysochromulinaceae; Chrysochromulina.
OX NCBI_TaxID=407208 {ECO:0000313|EMBL:ABJ80966.1};
RN [1] {ECO:0000313|EMBL:ABJ80966.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=NIES 1333 {ECO:0000313|EMBL:ABJ80966.1};
RX PubMed=16982820; DOI=10.1093/molbev/msl120;
RA Kim E., Simpson A.G., Graham L.E.;
RT "Evolutionary relationships of apusomonads inferred from taxon-rich
RT analyses of 6 nuclear encoded genes.";
RL Mol. Biol. Evol. 23:2455-2466(2006).
CC -!- FUNCTION: Tubulin is the major constituent of microtubules, a cylinder
CC consisting of laterally associated linear protofilaments composed of
CC alpha- and beta-tubulin heterodimers. Microtubules grow by the addition
CC of GTP-tubulin dimers to the microtubule end, where a stabilizing cap
CC forms. Below the cap, tubulin dimers are in GDP-bound state, owing to
CC GTPase activity of alpha-tubulin. {ECO:0000256|RuleBase:RU000352}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=GTP + H2O = GDP + H(+) + phosphate; Xref=Rhea:RHEA:19669,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:37565,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:58189;
CC Evidence={ECO:0000256|ARBA:ARBA00001702};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:19670;
CC Evidence={ECO:0000256|ARBA:ARBA00001702};
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. {ECO:0000256|RuleBase:RU000352}.
CC -!- SIMILARITY: Belongs to the tubulin family.
CC {ECO:0000256|ARBA:ARBA00009636, ECO:0000256|RuleBase:RU000352}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; DQ980488; ABJ80966.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A4I7; -.
DR GO; GO:0005874; C:microtubule; IEA:UniProtKB-KW.
DR GO; GO:0005525; F:GTP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0016787; F:hydrolase activity; 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 CDD; cd02186; alpha_tubulin; 1.
DR Gene3D; 1.10.287.600; Helix hairpin bin; 1.
DR Gene3D; 3.30.1330.20; Tubulin/FtsZ, C-terminal domain; 1.
DR Gene3D; 3.40.50.1440; Tubulin/FtsZ, GTPase domain; 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; TUBULIN; 1.
DR PANTHER; PTHR11588:SF239; TUBULIN ALPHA CHAIN; 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; SSF55307; Tubulin C-terminal domain-like; 1.
DR SUPFAM; SSF52490; Tubulin nucleotide-binding domain-like; 1.
DR PROSITE; PS00227; TUBULIN; 1.
PE 3: Inferred from homology;
KW GTP-binding {ECO:0000256|ARBA:ARBA00023134, ECO:0000256|RuleBase:RU000352};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801};
KW Microtubule {ECO:0000256|ARBA:ARBA00022701, ECO:0000256|RuleBase:RU000352};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741,
KW ECO:0000256|RuleBase:RU000352}.
FT DOMAIN 21..218
FT /note="Tubulin/FtsZ GTPase"
FT /evidence="ECO:0000259|SMART:SM00864"
FT DOMAIN 220..365
FT /note="Tubulin/FtsZ 2-layer sandwich"
FT /evidence="ECO:0000259|SMART:SM00865"
FT NON_TER 1
FT /evidence="ECO:0000313|EMBL:ABJ80966.1"
FT NON_TER 378
FT /evidence="ECO:0000313|EMBL:ABJ80966.1"
SQ SEQUENCE 378 AA; 41707 MW; 044DA9511C7A4E09 CRC64;
GIQPDGQMPS DKTIGGGDDA FNTFFSETGS GKHVPRCVFV DLEPTVVDEV RTGTYRQLYH
PEQLISGKED AANNYARGHY TIGKEIVDLV LDRIRKLADN CTGLQGFLVF NAVGGGTGSG
LGALLLERLS VDYGRKPKLS FTIYPSPQVS TAVVEPYNCV LSTHSLLEHT DVSFMVDNEA
LYDICRRNLD IERPTYTNLN RLIAQIISSL TASLRFDGAL NVDVTEFQTN LVPYPRIHFV
VSSYAPVISA EKAYHEQLSV AEITNSAFEP ASMLCKVDPR HGKYMAVCLM YRGDVVPKDV
NAAVATIKTK RTIQFVDWCP TGFKCGINYQ PPTVVPGGDL AKVMRAVAMM SNSTAIAELY
SRIDHKFDLM YAKRAFVH
//
