ID   MMK2_MEDSA              Reviewed;         371 AA.
AC   Q40353;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=Mitogen-activated protein kinase homolog MMK2;
DE            EC=2.7.11.24;
GN   Name=MMK2;
OS   Medicago sativa (Alfalfa).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; 50 kb inversion clade;
OC   NPAAA clade; Hologalegina; IRL clade; Trifolieae; Medicago.
OX   NCBI_TaxID=3879;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Embryo;
RX   PubMed=7476871; DOI=10.1007/bf02191708;
RA   Jonak C., Kiegerl S., Lloyd C., Chan J., Hirt H.;
RT   "MMK2, a novel alfalfa MAP kinase, specifically complements the yeast MPK1
RT   function.";
RL   Mol. Gen. Genet. 248:686-694(1995).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-
CC         [protein]; Xref=Rhea:RHEA:17989, Rhea:RHEA-COMP:9863, Rhea:RHEA-
CC         COMP:11604, ChEBI:CHEBI:15378, ChEBI:CHEBI:29999, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:83421, ChEBI:CHEBI:456216; EC=2.7.11.24;
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-
CC         threonyl-[protein]; Xref=Rhea:RHEA:46608, Rhea:RHEA-COMP:11060,
CC         Rhea:RHEA-COMP:11605, ChEBI:CHEBI:15378, ChEBI:CHEBI:30013,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:61977, ChEBI:CHEBI:456216;
CC         EC=2.7.11.24;
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000250};
CC   -!- ACTIVITY REGULATION: Activated by tyrosine and threonine
CC       phosphorylation. {ECO:0000250}.
CC   -!- DOMAIN: The TXY motif contains the threonine and tyrosine residues
CC       whose phosphorylation activates the MAP kinases.
CC   -!- PTM: Dually phosphorylated on Thr-195 and Tyr-197, which activates the
CC       enzyme (By similarity). Autophosphorylated. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the protein kinase superfamily. CMGC Ser/Thr
CC       protein kinase family. MAP kinase subfamily. {ECO:0000305}.
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DR   EMBL; X82268; CAA57719.1; -; mRNA.
DR   PIR; S60121; S60121.
DR   AlphaFoldDB; Q40353; -.
DR   SMR; Q40353; -.
DR   BRENDA; 2.7.11.24; 3078.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0004707; F:MAP kinase activity; IEA:UniProtKB-EC.
DR   GO; GO:0106310; F:protein serine kinase activity; IEA:RHEA.
DR   GO; GO:0006468; P:protein phosphorylation; IEA:InterPro.
DR   InterPro; IPR011009; Kinase-like_dom_sf.
DR   InterPro; IPR003527; MAP_kinase_CS.
DR   InterPro; IPR000719; Prot_kinase_dom.
DR   InterPro; IPR017441; Protein_kinase_ATP_BS.
DR   InterPro; IPR008271; Ser/Thr_kinase_AS.
DR   Pfam; PF00069; Pkinase; 1.
DR   SMART; SM00220; S_TKc; 1.
DR   SUPFAM; SSF56112; SSF56112; 1.
DR   PROSITE; PS01351; MAPK; 1.
DR   PROSITE; PS00107; PROTEIN_KINASE_ATP; 1.
DR   PROSITE; PS50011; PROTEIN_KINASE_DOM; 1.
DR   PROSITE; PS00108; PROTEIN_KINASE_ST; 1.
PE   2: Evidence at transcript level;
KW   ATP-binding; Kinase; Nucleotide-binding; Phosphoprotein;
KW   Serine/threonine-protein kinase; Transferase.
FT   CHAIN           1..371
FT                   /note="Mitogen-activated protein kinase homolog MMK2"
FT                   /id="PRO_0000186318"
FT   DOMAIN          37..323
FT                   /note="Protein kinase"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159"
FT   MOTIF           195..197
FT                   /note="TXY"
FT   ACT_SITE        163
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159,
FT                   ECO:0000255|PROSITE-ProRule:PRU10027"
FT   BINDING         43..51
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159"
FT   BINDING         66
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00159"
FT   MOD_RES         195
FT                   /note="Phosphothreonine"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         197
FT                   /note="Phosphotyrosine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   371 AA;  42794 MW;  1903E2D43158A4EE CRC64;
     MSVESAENNI RGVPTHGGRY LQYNIYGNLF EVSRKYVPPI RSVGRGAYGI VCAAVNAETR
     EEVAIKKIGN AFDNRIDAKR TLREIKLLRH MDHENVMSIK DIIRPPQKEN FNHVYIVSEL
     MDTDLHQIIR SNQPMTDDHC RYFVYQLLRG LKYVHSANVL HRDLKPSNLL LNANCDLKIG
     DFGLARTTSE TDFMTEYVVT RWYRAPELLL NCSDYTAAID IWSVGCILGE IVTRQPLFPG
     RDYVHQLRLV TELIGSPDDA SLGFLRSENA RRYVRQLPQY PKQNFSARFP NMSPGAVDLL
     EKMLIFDPSK RIKVDEALCH PYMAPLHDIN EEPVCARPFS FDFEEPMFTE EDIKELIWKE
     SVRFNPDPPI N