Native structure of IRIP, a type I ribosome inactivating protein from Iris hollandica var. at 1.25 A

Type 1 ribosome-inactivating proteins are the most abundant proteins in iris (Iris hollandica var. Professor Blaauw) bulbs: characterization and molecular cloning

Analysis of several key active site residues of ricin A chain by mutagenesis and X-ray crystallography

Site-directed mutagenesis of ricin A-chain and implications for the mechanism of action

IETVEFRVTGTTRRSYSDFLQNLRNRLSSGTSVHDIPLLPAQSGSQQDLLFVRLFDWGNRPITLVLNRVNAYVVAYQAQN
RFYLLSDTPANPQVYGNNPHRLTFTGSYGALQNVAKSNRENIDLGINPLATAITTLHNWSPPTVETSVARSLIVLIQLVS
ETARFRAIEQRVTNNIIDQVTPIRYDNFRPRVGIIDLQTNWQTLSTEVQRAEGGRFLQPVKLQVSVQQTVVISDVEKART
FCGLALLLRWRPSQASLSSHDFAWRDIRSILDIGA

1.9M ammonium sulfate in 20% w/v glycerol, pH 5.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

THERE ARE CONFLICTS BETWEEN THE SEQUENCE AND DATABASE REFERENCE SEQUENCE. THE RESIDUES ARE CONSISTENT WITH ELECTRON DENSITY. FOR THR A 134, B 105 AND B 134, THEY ARE REFERRED IN BIOCHEM J. 1997 JUN 15;324 (PT 3):963-70; VAN DAMME EJ ET AL.

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS; Ala 93 (A/B) and Glycin 251 were refined based on the electron density results. Results are discussed in the publication.

THE IRIP DIMER IN THE ASYMMETRIC UNIT HAS BEEN FOUND IN AN NON-CRYSTALLOGRAPHIC 2-FOLD SYMMETRY. FORMATION OF THAT DIMER HAS PROBABLY NO BIOLOGICAL MEANING AND IS A RESULT OF THE CRYSTALLIZATION PROCESS.

Ribosome inactivating protein type I, IRIP, Pi-Loop, HYDROLASE

IETVEFRVTGTTRRSYSDFLQNLRNRLSSGTSVHDIPLLPAQSGSQQDLLFVRLFDWGNRPITLVLNRVNAYVVAYQAQN
RFYLLADTPANPQVYGNNPHRLTFIGSYGALQNVAKQNRENIDLGINPLATAISTLHNWSPPTVETSVARSLIVLIQLVS
ETARFRAIEQRVTNNIIDQVTPIRYDNFRPSVGIIDLQTNWQTLSTEVQRAEGGRFLQPVKLQVSVQQTVVISDVEKART
FCGLALLLRWRPSQASLSSHDFAWRDIRSILDIGA