Abstract:
:Plants possess very large numbers of biosynthetic cytochrome P450 enzymes. In spite of the importance of these enzymes for the synthesis of bioactive plant secondary metabolites, only two plant P450 structures has been obtained to date. Isoflavone synthase (IFS) is a membrane-associated cytochrome P450 enzyme catalyzing the entry-point reaction into isoflavonoid biosynthesis. IFS from the model legume Medicago truncatula (CYP93C20) was engineered by deleting the membrane-spanning domain and inserting a hydrophilic polypeptide in the N-terminus and a four histidine tag at the C-terminus. The truncated form exhibited dramatically enhanced expression and solubility. The engineered enzyme was expressed in Escherichia coli XL1-blue cells and was purified by Ni(2+)-NTA affinity chromatograph and size-exclusion chromatograph. The purified enzyme was characterized by enzyme assay, reduced carbon monoxide difference spectroscopy and peptide mass fingerprinting. The engineered soluble enzyme exhibited the same activity as the full length membrane-associated enzyme expressed in yeast. These studies suggest an approach for engineering plant membrane-associated P450s with enhanced expression and solubility for mechanistic and structural studies.
journal_name
Protein Expr Purifjournal_title
Protein expression and purificationauthors
Chang Z,Wang X,Wei R,Liu Z,Shan H,Fan G,Hu Hdoi
10.1016/j.pep.2010.11.012subject
Has Abstractpub_date
2010-12-04 00:00:00eissn
1046-5928issn
1096-0279pii
S1046-5928(10)00322-0pub_type
杂志文章abstract::The role of FIC (Filamentation induced by cAMP)(2) domain containing proteins in the regulation of many vital pathways, mostly through the transfer of NMPs from NTPs to specific target proteins (NMPylation), in microorganisms, higher eukaryotes, and plants is emerging. The identity and function of FIC domain containin...
journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::G-protein coupled receptors (GPCRs) are seven transmembrane helical proteins involved in cell signaling and response. They are targets for many existing therapeutic agents, and numerous drug discovery efforts. Production of large quantities of these receptors for drug screening and structural biology remains challengi...
journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::Integrated studies that address proteins structure and function in the new era of systems biology and genomics often require the application of high-throughput approaches for parallel production of many different purified proteins from the same organism. Cytochromes c-electron transfer proteins carrying one or more he...
journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::Hepatitis C virus encodes two enveloped glycoproteins, E1 and E2, which are involved in viral attachment and entry into target cells. We have obtained in insect cells infected by recombinant baculovirus a chimeric secreted recombinant protein, E1(341)E2(661,) containing the ectodomains of E1 and E2. The described proc...
journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/1046-5928(91)90073-r
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journal_title:Protein expression and purification
pub_type: 杂志文章
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abstract::Nedd4 is an E3 ubiquitin ligase that has received increased attention due to its role in the maintenance of proteostasis and in cellular stress responses. Investigation of Nedd4 enzymology has revealed a complex enzymatic mechanism that involves intermolecular interactions with upstream E2 conjugating enzymes and with...
journal_title:Protein expression and purification
pub_type: 杂志文章
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更新日期:2020-09-01 00:00:00
abstract::The sequence of the gene from Nocardia sp. NRRL 5646 encoding GTP cyclohydrolase I (GCH), gch, and its adjacent regions was determined. The open reading frame of Nocardia gch contains 684 nucleotides, and the deduced amino acid sequence represents a protein of 227 amino acid residues with a calculated molecular mass o...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2004.02.008
更新日期:2004-06-01 00:00:00
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2003.08.014
更新日期:2004-01-01 00:00:00
abstract::An alpha-amylase has been purified from the thermophilic fungus Scytalidium thermophilum. A ninefold purification was achieved in a single step using fluidized bed chromatography wherein alginate was used as the affinity matrix. There are at least two isoenzymes as shown by concanavalin A (Con A)-agarose column chroma...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.2000.1308
更新日期:2000-11-01 00:00:00
abstract::A recombinant H(C) fragment of botulinum neurotoxin, serotype A (rBoNTA(H(C))), has been successfully expressed in a Mut(+) strain of the methylotrophic yeast Pichia pastoris for use as an antigen in a proposed human vaccine. Fermentation employed glycerol batch, glycerol-fed batch, and methanol-fed batch phases to ac...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.2000.1256
更新日期:2000-08-01 00:00:00
abstract::We report the molecular cloning, expression, and single-step homogeneous purification of a full-length asparaginyl tRNA synthetase (NRS) from Fasciola gigantica (FgNRS). Fasciola gigantica is a parasitic liver fluke of the class Trematoda. It causes fascioliasis that infects the liver of various mammals, including hum...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2017.10.009
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
pub_type: 杂志文章
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journal_title:Protein expression and purification
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journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2006.12.019
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abstract::Chinese hamster dihydrofolate reductase (ch-DHFR) was overexpressed in Escherichia coli DH5 alpha under the transcriptional control of PRPL promoters regulated by temperature-sensitive repressors. The desired recombinant product is soluble and constitutes about 30% of the total soluble proteins of the bacterial cell. ...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.1996.0676
更新日期:1997-03-01 00:00:00
abstract::The Clostridium botulinum neurotoxins (BoNTs) are the most potent protein toxins known to humans. There are seven serotypes of the BoNTs (A-G), among which serotypes A, B, E and F are known to cause natural human intoxication. To date, eleven subtypes of LC/E, termed E1∼E11, have been identified. The LCs of BoNT/E wer...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2015.10.003
更新日期:2016-02-01 00:00:00
abstract::Influenza A virus displays one of the highest infection rates of all human viruses and therefore represents a severe human health threat associated with an important economical challenge. Influenza matrix protein 2 (M2) is a membrane protein of the viral envelope that forms a proton selective ion channel. Here we repo...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2016.11.001
更新日期:2017-03-01 00:00:00
abstract::A functional IP10-scFv fusion protein retaining the antibody specificity for acidic isoferritin and chemokine function was produced at high level in Esherichia coli (E. coli). IP10-scFv gene from the recombinant plasmid pc3IP104c9 was subcloned into pET28a fused to N-terminal His-tag sequence in frame and overexpresse...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2005.05.016
更新日期:2006-01-01 00:00:00
abstract::Protein phosphatase 2A (PP2A) contains a 36-kDa catalytic subunit (PP2Ac), a 65-kDa structural subunit (PR65/A), and a regulatory B subunit. The core enzyme consists of the structural and catalytic subunits. The catalytic subunit exists as two closely related isoforms, alpha and beta. Several natural toxins, including...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1016/j.pep.2005.06.002
更新日期:2006-01-01 00:00:00
abstract::L-Threonine dehydrogenase was purified 10,000-fold to a specific activity approximately 300 mumol.min-1.mg-1 protein from porcine liver mitochondria. Purification to apparent homogeneity was achieved by sequential chromatography on DEAE Sepharose FF, Affi-Gel Blue, Sephacryl S-200, Matrex Gel Red A, and Matrex Gel Gre...
journal_title:Protein expression and purification
pub_type: 杂志文章
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更新日期:1994-10-01 00:00:00
abstract::Stromal-cell-derived factor-1 (SDF-1alpha) is an 8-kDa chemokine that is constitutively expressed in bone-marrow-derived stromal cells and has been identified as a ligand for the CXCR4 receptor. We produced the chemokine recombinantly as methionine-SDF-1alpha in Escherichia coli without the leader peptide sequence. Th...
journal_title:Protein expression and purification
pub_type: 杂志文章
doi:10.1006/prep.2001.1402
更新日期:2001-04-01 00:00:00