ID   IF4A9_TOBAC             Reviewed;         413 AA.
AC   Q40471;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 1.
DT   03-AUG-2022, entry version 101.
DE   RecName: Full=Eukaryotic initiation factor 4A-9;
DE            Short=eIF-4A-9;
DE            EC=3.6.4.13;
DE   AltName: Full=ATP-dependent RNA helicase eIF4A-9;
OS   Nicotiana tabacum (Common tobacco).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Solanaceae; Nicotianoideae; Nicotianeae;
OC   Nicotiana.
OX   NCBI_TaxID=4097;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. SR1;
RX   PubMed=7858215; DOI=10.1007/bf00019489;
RA   Owttrim G.W., Mandel T., Trachsel H., Thomas A.A., Kuhlemeier C.;
RT   "Characterization of the tobacco eIF-4A gene family.";
RL   Plant Mol. Biol. 26:1747-1757(1994).
CC   -!- FUNCTION: ATP-dependent RNA helicase which is a subunit of the eIF4F
CC       complex involved in cap recognition and is required for mRNA binding to
CC       ribosome. In the current model of translation initiation, eIF4A unwinds
CC       RNA secondary structures in the 5'-UTR of mRNAs which is necessary to
CC       allow efficient binding of the small ribosomal subunit, and subsequent
CC       scanning for the initiator codon (By similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + H2O = ADP + H(+) + phosphate; Xref=Rhea:RHEA:13065,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:43474, ChEBI:CHEBI:456216; EC=3.6.4.13;
CC   -!- SUBUNIT: eIF4F is a multi-subunit complex, the composition of which
CC       varies with external and internal environmental conditions. It is
CC       composed of at least EIF4A, EIF4E and EIF4G (By similarity).
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the DEAD box helicase family. eIF4A subfamily.
CC       {ECO:0000305}.
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; X79135; CAA55736.1; -; mRNA.
DR   PIR; S52017; S52017.
DR   RefSeq; NP_001312359.1; NM_001325430.1.
DR   RefSeq; XP_016464153.1; XM_016608667.1.
DR   AlphaFoldDB; Q40471; -.
DR   SMR; Q40471; -.
DR   PRIDE; Q40471; -.
DR   GeneID; 107787142; -.
DR   KEGG; nta:107787142; -.
DR   OMA; EKKSFGY; -.
DR   OrthoDB; 726081at2759; -.
DR   Proteomes; UP000084051; Unplaced.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0016887; F:ATP hydrolysis activity; IEA:RHEA.
DR   GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0003724; F:RNA helicase activity; IEA:UniProtKB-EC.
DR   GO; GO:0003743; F:translation initiation factor activity; IBA:GO_Central.
DR   GO; GO:0002183; P:cytoplasmic translational initiation; IBA:GO_Central.
DR   Gene3D; 3.40.50.300; -; 2.
DR   InterPro; IPR011545; DEAD/DEAH_box_helicase_dom.
DR   InterPro; IPR014001; Helicase_ATP-bd.
DR   InterPro; IPR001650; Helicase_C.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR000629; RNA-helicase_DEAD-box_CS.
DR   InterPro; IPR014014; RNA_helicase_DEAD_Q_motif.
DR   Pfam; PF00270; DEAD; 1.
DR   Pfam; PF00271; Helicase_C; 1.
DR   SMART; SM00487; DEXDc; 1.
DR   SMART; SM00490; HELICc; 1.
DR   SUPFAM; SSF52540; SSF52540; 1.
DR   PROSITE; PS00039; DEAD_ATP_HELICASE; 1.
DR   PROSITE; PS51192; HELICASE_ATP_BIND_1; 1.
DR   PROSITE; PS51194; HELICASE_CTER; 1.
DR   PROSITE; PS51195; Q_MOTIF; 1.
PE   2: Evidence at transcript level;
KW   ATP-binding; Helicase; Hydrolase; Initiation factor; Nucleotide-binding;
KW   Protein biosynthesis; Reference proteome; RNA-binding.
FT   CHAIN           1..413
FT                   /note="Eukaryotic initiation factor 4A-9"
FT                   /id="PRO_0000054956"
FT   DOMAIN          71..241
FT                   /note="Helicase ATP-binding"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00541"
FT   DOMAIN          252..413
FT                   /note="Helicase C-terminal"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00542"
FT   MOTIF           40..68
FT                   /note="Q motif"
FT   MOTIF           189..192
FT                   /note="DEAD box"
FT   BINDING         84..91
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00541"
SQ   SEQUENCE   413 AA;  46826 MW;  E53B0D836444CAF7 CRC64;
     MAGAAPEGSQ FDARQYDSKM TELLNAEGQD FFTSYDEVYH SFDAMGLKEN LLRGIYAYGF
     EKPSAIQQRG IVPFCKGLDV IQQAQSGTGK TATFCSGILQ QLDYELLDCQ ALVLAPTREL
     AQQIEKVMRA LGDYLGVKVH ACVGGTSVRE DQRILSSGVH VVVGTPGRVF DMLRRQSLRP
     DHIKMFVLDE ADEMLSRGFK DQIYDIFQLL PPKIQVGVFS ATMPPEALEI TRKFMNKPVR
     ILVKRDELTL EGIKQFYVNV DKEEWKLETL CDLYETLAIT QSVIFVNTRR KVDWLTDKMR
     SRDHTVSATH GDMDQNTRDI IMREFRSGSS RVLITTDLLA RGIDVQQVSL VINYDLPTQP
     ENYLHRIGRS GRFGRKGVSI NFVTSDDERM LSDIQRFYNV VIEELPANVA DLL