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

Structural highlights

3mvg is a 2 chain structure with sequence from Iris hollandica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:,
Activity:rRNA N-glycosylase, with EC number 3.2.2.22
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

The most abundant protein of Iris bulbs has been identified as a type 1 ribosome-inactivating protein (RIP). Analysis of the purified proteins and molecular cloning of the corresponding cDNAs demonstrated that this type 1 RIP is a mixture of three isoforms that exhibit a high degree of sequence identity and have similar, though not identical, ribosome-inactivating and polynucleotide:adenosine glycosidase activities. The accumulation of large quantities of type 1 RIP in a vegetative storage organ suggests that this presumed defence-related protein also plays a role in the nitrogen-storage metabolism of the bulb.

Type 1 ribosome-inactivating proteins are the most abundant proteins in iris (Iris hollandica var. Professor Blaauw) bulbs: characterization and molecular cloning.,Van Damme EJ, Barre A, Barbieri L, Valbonesi P, Rouge P, Van Leuven F, Stirpe F, Peumans WJ Biochem J. 1997 Jun 15;324 ( Pt 3):963-70. PMID:9210423[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. Van Damme EJ, Barre A, Barbieri L, Valbonesi P, Rouge P, Van Leuven F, Stirpe F, Peumans WJ. Type 1 ribosome-inactivating proteins are the most abundant proteins in iris (Iris hollandica var. Professor Blaauw) bulbs: characterization and molecular cloning. Biochem J. 1997 Jun 15;324 ( Pt 3):963-70. PMID:9210423

3mvg, resolution 1.25Å

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