PXD005542-1

PXD005542 is an original dataset announced via ProteomeXchange.

Title	The papain-like cysteine proteinases NbCysP6 and NbCysP7 are highly processive enzymes with substrate specificities complementary to Nicotiana benthamiana cathepsin B
Description	The tobacco-related plant Nicotiana benthamiana is gaining interest as a versatile host for the production of monoclonal antibodies and other protein therapeutics. However, the susceptibility of plant-derived recombinant proteins to endogenous proteolytic enzymes limits their use as biopharmaceuticals. We have now identified two previously uncharacterized N. benthamiana proteases with high antibody-degrading activity, the papain-like cysteine proteinases NbCysP6 and NbCysP7. Both enzymes are capable of hydrolysing a wide range of synthetic substrates, although only NbCysP6 tolerates basic amino acids in its specificity-determining S2 subsite. The overlapping substrate specificities of NbCysP6 and NbCysP7 are also documented by the closely related properties of their other subsites as deduced from the action of the enzymes on proteome-derived peptide libraries. Notable differences were observed to the substrate preferences of N. benthamiana cathepsin B, another antibody-degrading papain-like cysteine proteinase. The complementary activities of NbCysP6, NbCysP7 and N. benthamiana cathepsin B indicate synergistic roles of these proteases in the turnover of recombinant and endogenous proteins in planta, thus representing a paradigm for the shaping of plant proteomes by the combined action of papain-like cysteine proteinases.
HostingRepository	PRIDE
AnnounceDate	2024-10-07
AnnouncementXML	Submission_2024-10-07_10:06:15.106.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Oliver Schilling
SpeciesList	scientific name: Escherichia coli; NCBI TaxID: 562;
ModificationList	dimethylated residue; iodoacetamide derivatized residue
Instrument	QSTAR; Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2016-12-12 00:23:56	ID requested
⏵ 1	2024-10-07 10:06:15	announced

Dataset with its publication pending

curator keyword: Biological

submitter keyword: Protease, specificity, proteome-derived peptide library

Oliver Schilling
contact affiliation	Institute of Molecular Medicine and Cell Research University of Freiburg Stefan-Meier-Str. 17, Room 02 027 D-79104 Freiburg, Germany +49 761 203 9615
contact email	oliver.schilling@mol-med.uni-freiburg.de
lab head
Oliver Schilling
contact affiliation	University of Freiburg
contact email	oliver.schilling@mol-med.uni-freiburg.de
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD005542
     1. Label: PRIDE project
     2. Name: The papain-like cysteine proteinases NbCysP6 and NbCysP7 are highly processive enzymes with substrate specificities complementary to Nicotiana benthamiana cathepsin B