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(-) Description

Title :  CRYSTAL STRUCTURE OF O-ACETYL HOMOSERINE SULFHYDRYLASE FROM THERMUS THERMOPHILUS HB8
 
Authors :  T. Imagawa, Y. Kousumi, H. Tsuge, H. Utsunomiya, A. Ebihara, N. Nakagaw S. Yokoyama, S. Kuramitsu, Riken Structural Genomics/Proteomics Initiative (Rsgi)
Date :  24 May 05  (Deposition) - 24 Nov 05  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.60
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A,B  (1x)
Biol. Unit 2:  A,B  (2x)
Biol. Unit 3:  A (1x),B (1x)
Keywords :  Crystal, O-Acetyl Homoserine Sulfhydrase, Structural Genomics, Riken Structural Genomics/Proteomics Initiative, Rsgi, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  T. Imagawa, Y. Kousumi, H. Tsuge, H. Utsunomiya, A. Ebihara, N. Nakagawa, S. Yokoyama, S. Kuramitsu
Crystal Structure Of O-Acetyl Homoserine Sulfhydrylase From Thermus Thermophilus Hb8
To Be Published
PubMed: search

(-) Compounds

Molecule 1 - O-ACETYL-L-HOMOSERINE SULFHYDRYLASE
    Chains: A, B
    EC Number: 2.5.1.-
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET11A
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Organism Scientific: THERMUS THERMOPHILUS
    Organism Taxid: 274

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AB
Biological Unit 1 (1x): AB
Biological Unit 2 (2x): AB
Biological Unit 3 (1x): A (1x)B (1x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 2)

Asymmetric Unit (1, 2)
No.NameCountTypeFull Name
1PLP2Ligand/IonPYRIDOXAL-5'-PHOSPHATE
Biological Unit 1 (1, 2)
No.NameCountTypeFull Name
1PLP2Ligand/IonPYRIDOXAL-5'-PHOSPHATE
Biological Unit 2 (1, 4)
No.NameCountTypeFull Name
1PLP4Ligand/IonPYRIDOXAL-5'-PHOSPHATE
Biological Unit 3 (1, 1)
No.NameCountTypeFull Name
1PLP1Ligand/IonPYRIDOXAL-5'-PHOSPHATE

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWARESER A:81 , GLY A:82 , HIS A:83 , GLN A:86 , TYR A:107 , ASP A:180 , THR A:182 , SER A:203 , THR A:205 , LYS A:206 , HOH A:677 , HOH A:679 , ARG B:54BINDING SITE FOR RESIDUE PLP A 600
2AC2SOFTWAREARG A:54 , SER B:81 , GLY B:82 , HIS B:83 , GLN B:86 , TYR B:107 , ASP B:180 , THR B:182 , SER B:203 , THR B:205 , LYS B:206 , HOH B:686 , HOH B:687BINDING SITE FOR RESIDUE PLP B 600

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2CTZ)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric Unit
No.Residues
1Asn A:155 -Pro A:156

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2CTZ)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2CTZ)

(-) Exons   (0, 0)

(no "Exon" information available for 2CTZ)

(-) Sequences/Alignments

Asymmetric Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it) 
Chain A from PDB  Type:PROTEIN  Length:421
 aligned with Q5SK88_THET8 | Q5SK88 from UniProtKB/TrEMBL  Length:421

    Alignment length:421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 
         Q5SK88_THET8     1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
               SCOP domains d2ctza1 A:1-421 O-acetyl-L-homoserine sulfhydrylase                                                                                                                                                                                                                                                                                                                                                                                   SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhh........................hhhhhhhhhh..hhhhh.....hhhhhhhhhhhhhhhh..eeeee.hhhhhhhhhhhhhh....eeee....hhhhhhhhhhhhhhh..eeee.....hhhhhhhhh...eeeeeee..........hhhhhhhhhhhhh.eeeee.hhhhhhh..hhhhhh..eeeee.............eeeee..........hhhhhh.hhhhh..hhhhhhh.hhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...eeeee........hhhhhhhhhh.....eeeeee.hhhhhhhhhhhh....ee.........eeehhhhh.....hhhhhhhh.....eeeee....hhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ctz A   1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 


Chain A from PDB  Type:PROTEIN  Length:421
 aligned with Q93I77_THETH | Q93I77 from UniProtKB/TrEMBL  Length:421

    Alignment length:421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 
         Q93I77_THETH     1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
               SCOP domains d2ctza1 A:1-421 O-acetyl-L-homoserine sulfhydrylase                                                                                                                                                                                                                                                                                                                                                                                   SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhh........................hhhhhhhhhh..hhhhh.....hhhhhhhhhhhhhhhh..eeeee.hhhhhhhhhhhhhh....eeee....hhhhhhhhhhhhhhh..eeee.....hhhhhhhhh...eeeeeee..........hhhhhhhhhhhhh.eeeee.hhhhhhh..hhhhhh..eeeee.............eeeee..........hhhhhh.hhhhh..hhhhhhh.hhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...eeeee........hhhhhhhhhh.....eeeeee.hhhhhhhhhhhh....ee.........eeehhhhh.....hhhhhhhh.....eeeee....hhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ctz A   1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 


Chain B from PDB  Type:PROTEIN  Length:421
 aligned with Q5SK88_THET8 | Q5SK88 from UniProtKB/TrEMBL  Length:421

    Alignment length:421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 
         Q5SK88_THET8     1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
               SCOP domains d2ctzb_ B: automated matches                                                                                                                                                                                                                                                                                                                                                                                                          SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhh........................hhhhhhhhhh..hhhhh.....hhhhhhhhhhhhhhhh..eeeee.hhhhhhhhhhhhhh....eeee....hhhhhhhhhhhhhhh..eeee.....hhhhhhhh....eeeeeee..........hhhhhhhhhhhhh.eeeee.hhhhhhh..hhhhhh..eeeee.............eeeee..........hhhhhh.hhhhh..hhhhhhh.hhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...eeee.........hhhhhhhhhh.....eeeeee.hhhhhhhhhhhh....ee.........eeehhhhh.....hhhhhhhh.....eeeee....hhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ctz B   1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 


Chain B from PDB  Type:PROTEIN  Length:421
 aligned with Q93I77_THETH | Q93I77 from UniProtKB/TrEMBL  Length:421

    Alignment length:421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420 
         Q93I77_THETH     1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
               SCOP domains d2ctzb_ B: automated matches                                                                                                                                                                                                                                                                                                                                                                                                          SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhh........................hhhhhhhhhh..hhhhh.....hhhhhhhhhhhhhhhh..eeeee.hhhhhhhhhhhhhh....eeee....hhhhhhhhhhhhhhh..eeee.....hhhhhhhh....eeeeeee..........hhhhhhhhhhhhh.eeeee.hhhhhhh..hhhhhh..eeeee.............eeeee..........hhhhhh.hhhhh..hhhhhhh.hhhhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...eeee.........hhhhhhhhhh.....eeeeee.hhhhhhhhhhhh....ee.........eeehhhhh.....hhhhhhhh.....eeeee....hhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ctz B   1 MRFETLQLHAGYEPEPTTLSRQVPIYPTTSYVFKSPEHAANLFALKEFGNIYSRIMNPTVDVLEKRLAALEGGKAALATASGHAAQFLALTTLAQAGDNIVSTPNLYGGTFNQFKVTLKRLGIEVRFTSREERPEEFLALTDEKTRAWWVESIGNPALNIPDLEALAQAAREKGVALIVDNTFGMGGYLLRPLAWGAALVTHSLTKWVGGHGAVIAGAIVDGGNFPWEGGRYPLLTEPQPGYHGLRLTEAFGELAFIVKARVDGLRDQGQALGPFEAWVVLLGMETLSLRAERHVENTLHLAHWLLEQPQVAWVNYPGLPHHPHHDRAQKYFKGKPGAVLTFGLKGGYEAAKRFISRLKLISHLANVGDTRTLAIHPASTTHSQLSPEEQAQAGVSPEMVRLSVGLEHVEDLKAELKEALA 421
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420
   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (2, 2)

Asymmetric Unit
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2CTZ)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2CTZ)

(-) Gene Ontology  (7, 11)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (Q5SK88_THET8 | Q5SK88)
molecular function
    GO:0003824    catalytic activity    Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
    GO:0030170    pyridoxal phosphate binding    Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
    GO:0016765    transferase activity, transferring alkyl or aryl (other than methyl) groups    Catalysis of the transfer of an alkyl or aryl (but not methyl) group from one compound (donor) to another (acceptor).
biological process
    GO:0006520    cellular amino acid metabolic process    The chemical reactions and pathways involving amino acids, carboxylic acids containing one or more amino groups, as carried out by individual cells.

Chain A,B   (Q93I77_THETH | Q93I77)
molecular function
    GO:0003961    O-acetylhomoserine aminocarboxypropyltransferase activity    Catalysis of the reaction: O-acetyl-L-homoserine + methanethiol = L-methionine + acetate. Also reacts with other thiols and H2S, producing homocysteine or thioethers.
    GO:0003824    catalytic activity    Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
    GO:0030170    pyridoxal phosphate binding    Interacting selectively and non-covalently with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6.
    GO:0016740    transferase activity    Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
    GO:0016765    transferase activity, transferring alkyl or aryl (other than methyl) groups    Catalysis of the transfer of an alkyl or aryl (but not methyl) group from one compound (donor) to another (acceptor).
biological process
    GO:0071266    'de novo' L-methionine biosynthetic process    The chemical reactions and pathways resulting in the formation of L-methionine, the L-enantiomer of (2S)-2-amino-4-(methylsulfanyl)butanoic acid, from simpler components.
    GO:0006520    cellular amino acid metabolic process    The chemical reactions and pathways involving amino acids, carboxylic acids containing one or more amino groups, as carried out by individual cells.

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