Crystal Structure of Helicobacter pylori gamma-Glutamyltranspeptidase

Autoprocessing of Helicobacter pylori gamma-glutamyltranspeptidase leads to the formation of a threonine-threonine catalytic dyad.

MGSSHHHHHHSSGLVPRGSHMASASYPPIKNTKVGLALSSHPLASEIGQKVLEEGGNAIDAAVAIGFALAVVHPAAGNIG
GGGFAVIHLANGENVALDFREKAPLKATKNMFLDKQGNVVPKLSEDGYLAAGVPGTVAGMEAMLKKYGTKKLSQLIDPAI
KLAENGYAISQRQAETLKEARERFLKYSSSKKYFFKKGHLDYQEGDLFVQKDLAKTLNQIKTLGAKGFYQGQVAELIEKD
MKKNGGIITKEDLASYNVKWRKPVVGSYRGYKIISMSPPSSGGTHLIQILNVMENADLSALGYGASKNIHIAAEAMRQAY
ADRSVYMGDADFVSVPVDKLINKAYAKKIFDTIQPDTVTPSSQIKPGMGQLHEGSN

TTHYSVADRWGNAVSVTYTINASYGSAASIDGAGFLLNNEMDDFSIKPGNPNLYGLVGGDANAIEANKRPLSSMSPTIVL
KNNKVFLVVGSPGGSRIITTVLQVISNVIDYNMNISEAVSAPRFHMQWLPDELRIEKFGMPADVKDNLTKMGYQIVTKPV
MGDVNAIQVLPKTKGSVFYGSTDPRKEF

200 mM HEPES, 25% PEG MME2000, 5 mg/mL protein, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 291K

Crystal Structure of E.coli Gamma-glutamyltranspeptidase

Crystal Structure of E.coli Gamma-glutamyltranspeptidase Acyl-Enzyme Intermediate

Crystal Structure of E.coli Gamma-glutamyltranspeptidase Complexed with L-Glutamate

COMPOUND
THE ASYMMETRIC UNIT CONTAINS A HETEROTETRAMER WHICH
IS FORMED FROM TWO COMPLETE POLYPEPTIDE CHAINS THAT
UNDERGO AUTOPROCESSING (CHAIN BREAKING BETWEEN
RESIDUES 379 AND 380). THIS CHAIN BREAKING LEADS TO
ACTIVATION OF THE ENZYME. AUTHOR STATES, THAT
EXCEPT BEING A TRANSFERASE, THIS ENZYME IS ALSO A
HYDROLASE.

Ntn-hydrolase, glutamyltranspeptidase, TRANSFERASE

ASYPPIKNTKVGLALSSHPLASEIGQKVLEEGGNAIDAAVAIGFALAVVHPAAGNIGGGGFAVIHLANGENVALDFREKA
PLKATKNMFLDKQGNVVPKLSEDGYLAAGVPGTVAGMEAMLKKYGTKKLSQLIDPAIKLAENGYAISQRQAETLKEARER
FLKYSSSKKYFFKKGHLDYQEGDLFVQKDLAKTLNQIKTLGAKGFYQGQVAELIEKDMKKNGGIITKEDLASYNVKWRKP
VVGSYRGYKIISMSPPSSGGTHLIQILNVMENADLSALGYGASKNIHIAAEAMRQAYADRSVYMGDADFVSVPVDKLINK
AYAKKIFDTIQPDTVTPSSQIKPGMGQLHEGSN