ID Q8MU31_HALGN Unreviewed; 365 AA.
AC Q8MU31;
DT 01-OCT-2002, integrated into UniProtKB/TrEMBL.
DT 01-OCT-2002, sequence version 1.
DT 27-MAR-2024, entry version 85.
DE RecName: Full=Tubulin alpha chain {ECO:0000256|RuleBase:RU000352};
DE Flags: Fragment;
OS Halteria grandinella.
OC Eukaryota; Sar; Alveolata; Ciliophora; Intramacronucleata; Spirotrichea;
OC Stichotrichia; Sporadotrichida; Halteriidae; Halteria.
OX NCBI_TaxID=5974 {ECO:0000313|EMBL:AAL33694.1};
RN [1] {ECO:0000313|EMBL:AAL33694.1}
RP NUCLEOTIDE SEQUENCE.
RA Katz L.A., Israel R.L.;
RT "The fate of duplicated alpha-tubulin genes in ciliates.";
RL Submitted (JUN-2001) to the EMBL/GenBank/DDBJ databases.
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|ARBA:ARBA00011747,
CC ECO:0000256|RuleBase:RU000352}.
CC -!- SIMILARITY: Belongs to the tubulin family.
CC {ECO:0000256|ARBA:ARBA00009636, ECO:0000256|RuleBase:RU000352}.
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DR EMBL; AY041114; AAL33694.1; -; Genomic_DNA.
DR AlphaFoldDB; Q8MU31; -.
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 11..208
FT /note="Tubulin/FtsZ GTPase"
FT /evidence="ECO:0000259|SMART:SM00864"
FT DOMAIN 210..355
FT /note="Tubulin/FtsZ 2-layer sandwich"
FT /evidence="ECO:0000259|SMART:SM00865"
FT NON_TER 1
FT /evidence="ECO:0000313|EMBL:AAL33694.1"
FT NON_TER 365
FT /evidence="ECO:0000313|EMBL:AAL33694.1"
SQ SEQUENCE 365 AA; 40148 MW; 9CDE938DB12B1822 CRC64;
DKTIGGGDDA FNTFFSETGA GKHVPRCVFL DLEPTVIDEV RTGTYRQLFH PEQLISGKED
AANNFARGHY TIGKEIVDLC LDRIRKLADQ CTGLQGFLVF NAVGGGTGSG LGSLLLERLS
VDYGKKSKLG FTVYPSPQVS TAVVEPYNSV LSTHSLLEHT DVAVMLDNEA VYDICRRNLD
IERPTYTNLN RLIAQVISSL TASLRFDGAL NVDVTVFQTN LVPYPRIHFM LSSYAPVISA
EKAYHEQLSV AEITNSAFEP ASMMAKCDPR HGKYMACCLM YRGDVVPKDV NAAVATIKTK
RTIQFVDWCP TGFKCGINYQ PPTVVPGGDL AKVMRACCMI SNSTAIAEVF SRIDHKFDLM
YAKRA
//
