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Strana 1 z 47 Výsledek
In Organello and in Vivo Evidence of the Importance of the Regulatory Sulfhydryl/Disulfide System and Pyruvate for Alternative Oxidase Activity in Tobacco.
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After isolation of tobacco (Nicotiana tabacum) leaf mitochondria, alternative oxidase (AOX) is predominantly present as the disulfide-linked, less-active "oxidized" form. In an in organello assay, significant AOX activity was dependent upon both the reduction of the regulatory disulfide bond (such
Selective removal of individual disulfide bonds within a potato type II serine proteinase inhibitor from Nicotiana alata reveals differential stabilization of the reactive-site loop.
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The 53-amino-acid trypsin inhibitor 1 from Nicotiana alata (T1) belongs to the potato type II family also known as the PinII family of proteinase inhibitors, one of the major families of canonical proteinase inhibitors. T1 contains four disulfide bonds, two of which (C4-C41 and C8-C37) stabilize the
Retention of a bean phaseolin/maize gamma-Zein fusion in the endoplasmic reticulum depends on disulfide bond formation.
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Most seed storage proteins of the prolamin class accumulate in the endoplasmic reticulum (ER) as large insoluble polymers termed protein bodies (PBs), through mechanisms that are still poorly understood. We previously showed that a fusion between the Phaseolus vulgaris vacuolar storage protein
The protein disulfide isomerase 1 of Phytophthora parasitica (PpPDI1) is associated with the haustoria-like structures and contributes to plant infection.
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Protein disulfide isomerase (PDI) is a ubiquitous and multifunction enzyme belonging to the thioredoxin (TRX) superfamily, which can reduce, oxidize, and catalyze dithiol-disulfide exchange reactions. Other than performing housekeeping functions in helping to maintain proteins in a more stable
Dimethyl disulfide produced by the naturally associated bacterium bacillus sp B55 promotes Nicotiana attenuata growth by enhancing sulfur nutrition.
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Bacillus sp B55, a bacterium naturally associated with Nicotiana attenuata roots, promotes growth and survival of wild-type and, particularly, ethylene (ET)-insensitive (35)S-ethylene response1 (etr1) N. attenuata plants, which heterologously express the mutant Arabidopsis thaliana receptor ETR1-1.
Meloidogyne graminicola protein disulfide isomerase may be a nematode effector and is involved in protection against oxidative damage.
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The rice root-knot nematode, Meloidogyne graminicola, is a serious pest in most rice-growing countries. Usually, nematodes employ antioxidants to counteract the harm of reactive oxygen species (ROS) and facilitate their infection. Here the gene encoding M. graminicola protein disulphide isomerase
A Rice Immunophilin Gene, OsFKBP16-3, Confers Tolerance to Environmental Stress in Arabidopsis and Rice.
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The putative thylakoid lumen immunophilin, FKBP16-3, has not yet been characterized, although this protein is known to be regulated by thioredoxin and possesses a well-conserved CxxxC motif in photosynthetic organisms. Here, we characterized rice OsFKBP16-3 and examined the role of this gene in the
The N-terminal region of Arabidopsis cystathionine gamma-synthase plays an important regulatory role in methionine metabolism.
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Cystathionine gamma-synthase (CGS) is a key enzyme of Met biosynthesis in bacteria and plants. Aligning the amino acid sequences revealed that the plant enzyme has an extended N-terminal region that is not found in the bacterial enzyme. However, this region is not essential for the catalytic
Post-transcriptional maturation of the S receptor kinase of Brassica correlates with co-expression of the S-locus glycoprotein in the stigmas of two Brassica strains and in transgenic tobacco plants.
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The S-locus-encoded S receptor kinase (SRK) is an intrinsic plasma membrane protein that is viewed as the primary stigma determinant of specificity in the self-incompatibility response of Brassica spp. We analyzed two self-compatible mutant strains that express low levels of the S-locus glycoprotein
Heligmosomoides polygyrus Venom Allergen-like Protein-4 (HpVAL-4) is a sterol binding protein.
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Heligmosomoides polygyrus bakeri is a model parasitic hookworm used to study animal and human helminth diseases. During infection, the parasite releases excretory/secretory products that modulate the immune system of the host. The most abundant protein family in excretory/secretory products
Cloning and sequencing of cDNAs encoding two self-incompatibility associated proteins in Solanum chacoense.
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We have isolated and sequenced cDNAs for S2- and S3-alleles of the self-incompatibility locus (S-locus) in Solanum chacoense Bitt., a wild potato species displaying gametophytic self-incompatibility. The S2- and S3-alleles encode pistil-specific proteins of 30 kDa and 31 kDa, respectively, which
A novel thermostable inhibitor of trypsin and subtilisin from the seeds of Brassica nigra: amino acid sequence, inhibitory and spectroscopic properties and thermostability.
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A novel thermostable protein inhibitor of trypsin and subtilisin, called BN, was isolated from the seeds of Brassica nigra. The purified protein gave a single band on SDS-PAGE, corresponding to a molecular mass of 15 500 +/- 1000 Da. The inhibitor is composed of two disulfide-linked polypeptide
Studies on the reducing systems for plant and animal thioredoxin-independent methionine sulfoxide reductases B.
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Two distinct stereospecific methionine sulfoxide reductases (Msr), MsrA and MsrB reduce the oxidized methionine (Met), methionine sulfoxide [Met(O)], back to Met. In this report, we examined the reducing systems required for the activities of two chloroplastic MsrB enzymes (NtMsrB1 and NtMsrB2) from
NAD(P)H:(Quinone-Acceptor) Oxidoreductase of Tobacco Leaves Is a Flavin Mononucleotide-Containing Flavoenzyme.
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The soluble NAD(P)H:(quinone-acceptor) oxidoreductase [NAD(P)H-QR, EC 1.6.99.2] of Nicotiana tabacum L. leaves and roots has been purified. NAD(P)H-QR contains noncovalently bound flavin mononucleotide. Pairs of subunits of 21.4 kD are linked together by disulfide bridges, but the active enzyme is a
Isolation by improved thermal asymmetric interlaced PCR and characterization of a seed-specific 2S albumin gene and its promoter from grape (Vitis vinifera L.).
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A seed-specific 2S albumin gene and its promoter region of grape (Vitis vinifera L.) were isolated using an improved thermal asymmetric interlaced PCR that allowed efficient amplification of target sequence of up to 3 kbp in length directly from genomic DNA. The 2S albumin VvAlb1 (for V. vinifera 2S
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