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CRYSTAL STRUCTURE OF HOMOSERINE KINASE COMPLEXED WITH ADP External Resource: Annotation Chains Domain Info Class Fold Superfamily Family Domain Species Provenance Source (Version) D d1fwkd1 Alpha and beta proteins (a+b) Ribosomal protein S5 domain 2-like Ribosomal protein S5 domain 2-like GHMP Kinase, N-terminal domain Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) D d1fwkd2 Alpha and beta proteins (a+b) Ferredoxin-like GHMP Kinase, C-terminal domain Homoserine kinase Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) C d1fwkc1 Alpha and beta proteins (a+b) Ribosomal protein S5 domain 2-like Ribosomal protein S5 domain 2-like GHMP Kinase, N-terminal domain Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) C d1fwkc2 Alpha and beta proteins (a+b) Ferredoxin-like GHMP Kinase, C-terminal domain Homoserine kinase Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) B d1fwkb1 Alpha and beta proteins (a+b) Ribosomal protein S5 domain 2-like Ribosomal protein S5 domain 2-like GHMP Kinase, N-terminal domain Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) B d1fwkb2 Alpha and beta proteins (a+b) Ferredoxin-like GHMP Kinase, C-terminal domain Homoserine kinase Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) A d1fwka1 Alpha and beta proteins (a+b) Ribosomal protein S5 domain 2-like Ribosomal protein S5 domain 2-like GHMP Kinase, N-terminal domain Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08) A d1fwka2 Alpha and beta proteins (a+b) Ferredoxin-like GHMP Kinase, C-terminal domain Homoserine kinase Homoserine kinase Methanocaldococcus jannaschii ) [TaxId: 2190 ], SCOPe (2.08)
Chains Type Family Name Domain Identifier Family Identifier Provenance Source (Version) D SCOP2B Superfamily Ribosomal protein S5 domain 2-like 8032983 3000100 SCOP2B (2022-06-29) D SCOP2B Superfamily GHMP Kinase, C-terminal domain 8032985 3001245 SCOP2B (2022-06-29) C SCOP2B Superfamily GHMP Kinase, C-terminal domain 8032985 3001245 SCOP2B (2022-06-29) C SCOP2B Superfamily Ribosomal protein S5 domain 2-like 8032983 3000100 SCOP2B (2022-06-29) B SCOP2B Superfamily GHMP Kinase, C-terminal domain 8032985 3001245 SCOP2B (2022-06-29) B SCOP2B Superfamily Ribosomal protein S5 domain 2-like 8032983 3000100 SCOP2B (2022-06-29) A SCOP2B Superfamily Ribosomal protein S5 domain 2-like 8032983 3000100 SCOP2B (2022-06-29) A SCOP2B Superfamily GHMP Kinase, C-terminal domain 8032985 3001245 SCOP2B (2022-06-29)
Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) D Propep_M14 e1fwkD1 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: Propep_M14 ECOD (v295.2) D HSP90,HATPase_c_3 e1fwkD2 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: HSP90,HATPase_c_3 ECOD (v295.2) C Propep_M14 e1fwkC1 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: Propep_M14 ECOD (v295.2) C HSP90,HATPase_c_3 e1fwkC2 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: HSP90,HATPase_c_3 ECOD (v295.2) B Propep_M14 e1fwkB1 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: Propep_M14 ECOD (v295.2) B HSP90,HATPase_c_3 e1fwkB2 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: HSP90,HATPase_c_3 ECOD (v295.2) A Propep_M14 e1fwkA1 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: Propep_M14 ECOD (v295.2) A HSP90,HATPase_c_3 e1fwkA2 A: alpha arrays X: ETN0001 domain-like H: ETN0001 domain-like T: Mss4-like F: HSP90,HATPase_c_3 ECOD (v295.2)
Chains Polymer Molecular Function Biological Process Cellular Component HOMOSERINE KINASE
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage Chains Enzyme Name Description Catalytic Residues homoserine kinase
M-CSA #778 Homoserine kinase (HSK) belongs to a large superfamily of GHMP kinases. It catalyses the phosphorylation of L-homoserine to O-phospho-L-homoserine, the first reaction after the branching-point to methionine in the bacterial threonine biosynthetic pathway. Mevalonate kinase, Galactokinase and Phosphomevalonate kinase are also members of the GHMP kinase superfamily but have a different mechanism proposed involving an aspartate acting as an initiating general base. HSK lacks this catalytic aspartate so is proposed to proceed with direct phosphorylation.