Abstract:
:Intracellular retinoid-binding proteins are small, tightly folded, compact proteins, which appear to be involved in the delivery of retinoids to microsomal metabolic enzymes, among other potential roles. Recently, it has been demonstrated that two of these binding proteins, cellular retinol-binding protein (CRBP) and cellular retinol-binding protein type II [CRBP(II)], interact with the same microsomal enzyme but in different manners, depending on the absence or presence of ligand [Herr, F.M., & Ong, D.E. (1992) Biochemistry 31, 6748-6755]. The structural components of the binding proteins responsible for these differential interactions are presently unknown. In addition, it is not clear how the ligand is able to gain entry into the solvent-inaccessible interior binding cavity. Limited proteolysis of the apo and holo forms of CRBP and CRBP(II) was used to probe the conformational differences between the different states of these two proteins in solution. It was found that the apo forms of both proteins were significantly more susceptible to proteolysis, and probably adopted a more open conformation, than the holo forms. The initial cleavage site of endoproteinase Arg-C in the apo forms occurred at a conserved arginine residue near a possible site of ligand entry. Similar results were obtained by limited proteolysis of cellular retinoic acid-binding protein and heart fatty acid-binding protein, indicating that a common ligand-induced conformational change may occur for other members of this family of intracellular binding proteins.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Biochemistryjournal_title
Biochemistryauthors
Jamison RS,Newcomer ME,Ong DEdoi
10.1021/bi00176a017subject
Has Abstractpub_date
1994-03-15 00:00:00pages
2873-9issue
10eissn
0006-2960issn
1520-4995journal_volume
33pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::Lactate dehydrogenase (LDH) catalyzes the interconversion between pyruvate and lactate with nicotinamide adenine dinucleotide (NAD) as a cofactor. Using isotope-edited difference Fourier transform infrared spectroscopy on the "live" reaction mixture (LDH·NADH·pyruvate ⇌ LDH·NAD(+)·lactate) for the wild-type protein an...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi500215a
更新日期:2014-03-25 00:00:00
abstract::Acyl carrier protein (ACP) is the central player in fatty acid (FA) biosynthesis. It covalently binds all FA intermediates and presents them to the enzymes needed for elongation. Bacterial ACP must interact with a large number of proteins, which raises the question of how different acyl-ACPs are recognized and disting...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi901713r
更新日期:2010-04-06 00:00:00
abstract::The unfolded state and flexible linkers in the folded structure play essential roles in protein stability and folding and protein-protein interactions. Intrinsic to these roles is the fact that unfolded proteins and flexible linkers sample many different conformations. Polymer models may capture this and complement ex...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi036269n
更新日期:2004-03-02 00:00:00
abstract::The misfolding of amyloid beta (Aβ) is one of the predominant hallmarks in the pathology of Alzheimer's disease (AD). In this study, we showed that the formation of the Aβ ion channel on the membrane depended on the cholesterol concentration. From a mechanical aspect, we found that cholesterol levels affected the stab...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.9b00968
更新日期:2020-03-03 00:00:00
abstract::The potency of cholesterol to affect the acyl chain order and dynamics of cardiolipin membranes in the liquid-crystalline state was monitored by steady-state and time-resolved fluorescence anisotropy as well as excited-state lifetime measurements with cis- and trans-parinaric acids as probes. Up to a cholesterol mole ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00357a054
更新日期:1986-05-06 00:00:00
abstract::Messenger RNA degradation is an important component of overall gene expression. During the final step of eukaryotic mRNA degradation, exoribonuclease 1 (Xrn1) carries out 5' → 3' processive, hydrolytic degradation of RNA molecules using divalent metal ion catalysis. To initiate studies of the 5' → 3' RNA decay machine...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.9b01035
更新日期:2020-04-21 00:00:00
abstract::In a large number of plant species hydroxynitrile lyases catalyze the decomposition of cyanohydrins in order to generate hydrogen cyanide upon tissue damage. Hydrogen cyanide serves as a deterrent against herbivores and fungi. In vitro hydroxynitrile lyases are proficient biocatalysts for the stereospecific synthesis ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi802162s
更新日期:2009-04-21 00:00:00
abstract::Binding of the N-acetyllactosamine-specific lectin from Erythrina corallodendron (ECorL) to four glycosphingolipids has been tested using the microtiter well assay. The role of several amino acids in the binding site region was studied by combining binding assays and molecular modeling for native and recombinant forms...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi962231h
更新日期:1997-04-15 00:00:00
abstract::Adenylosuccinate lyase, an enzyme catalyzing two reactions in purine biosynthesis (the cleavage of either adenylosuccinate or succinylaminoimidazole carboxamide ribotide), has been implicated in a human disease arising from point mutations in the gene encoding the enzyme. Asn(276) of Bacillus subtilis adenylosuccinate...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi020640+
更新日期:2003-02-25 00:00:00
abstract::Type B streptogramins, such as virginiamycin S (VS), are cyclic hexadepsipeptides, inhibiting protein synthesis in prokaryotes. L-Thr connects a 3-hydroxypicolinyl residue (3-OH-Pic) to the peptide lactone ring. The fluorescence intensity of 3-OH-Pic is strongly increased by chelation to alkaline earth cations or bind...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00243a033
更新日期:1991-07-23 00:00:00
abstract::The specific deamidation of asparagine-71 of triosephosphate isomerase increases upon substrate binding and catalysis. This deamidation at the dimer interface initiates subunit dissociation, unfolding, and protein degradation. The apparent connection between catalysis and terminal marking supports the concept of "mole...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00188a027
更新日期:1994-06-07 00:00:00
abstract::Galactosyltransferase (UDPgalactose:glycoprotein galactosyltransferase EC 2.4.1.22) was isolated from swine mesentary lymhromatography on Sepharose 4B colums containing covalently bound p-aminophenyl-beta-D-N-acetylglucosamine. The homogenous enzyme showed a single band on disc gel electrophoresis and had a specific a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00668a009
更新日期:1976-11-16 00:00:00
abstract::Much interest is currently focused on understanding the detailed contribution that particular amino acid residues make in protein structure and function. Although the use of site-directed mutagenesis has greatly contributed to this goal, the approach is limited to the standard repertoire of twenty amino acids. Fluorin...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi9617973
更新日期:1997-03-18 00:00:00
abstract::The preparation, spectroscopic investigation, structure determination, conformational analysis, and modeling of the Dewar pyrimidinone photoproduct of thymidylyl-(3'----5')-thymidine, previously referred to as TpT3 [Johns, H. E., Pearson, M. L., LeBlanc, J. C., & Heilleiner, C. W. (1964) J. Mol. Biol. 9, 503-524], is ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00419a007
更新日期:1988-09-20 00:00:00
abstract::The infectious isoform of the prion protein (PrPSc) is derived from cellular PrP (PrPC) in a conversion reaction involving a dramatic reorganization of secondary and tertiary structure. While our understanding of the pathogenic role of PrPSc has grown, the normal physiologic function of PrPC still remains unclear. Usi...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi972827k
更新日期:1998-05-19 00:00:00
abstract::Comparison of available sequences of HLA-A and HLA-B antigens shows that variable positions are predominantly localized in four segments spanning residues 63-85, 105-116, 138-156, and 177-194. The fourth segment is unique in that it contains no differences between antigens of the same locus. Secondary folding of HLA h...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00300a007
更新日期:1984-02-28 00:00:00
abstract::The temperature dependence of biological rates at different scales (from individual enzymes to isolated organisms to ecosystem processes such as soil respiration and photosynthesis) is the subject of much historical and contemporary research. The precise relationship between the temperature dependence of enzyme rates ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.0c00530
更新日期:2020-09-29 00:00:00
abstract::Apamin is being studied as a model for the folding mechanism of proteins whose structures are stabilized by disulfide bonds. Apamin consists of 18 amino acid residues and forms a stable structure consisting of a C-terminal alpha-helix and two reverse turns. This structure is stabilized by two disulfide bonds connectin...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00133a009
更新日期:1992-05-12 00:00:00
abstract::Previously we showed that the low-molecular-weight mucin (MG2, encoded by MUC7), a major component of human submandibular/sublingual saliva, is a bacterial receptor that coats the tooth surface. Here we tested the hypothesis that the structure of its carbohydrate residues contains important information about its funct...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi972612a
更新日期:1998-04-07 00:00:00
abstract::A single G3:U70 base pair in the acceptor helix is the major determinant of alanine acceptance in alanine transfer RNAs. Transfer of this base pair into other transfer RNAs confers alanine acceptance. A G3:C70 substitution eliminates alanine acceptance in vivo and in vitro. In this work, a population of mutagenized G3...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00157a019
更新日期:1992-10-27 00:00:00
abstract::Galactose oxidase is a remarkable enzyme containing a metalloradical redox cofactor capable of oxidizing a variety of primary alcohols during enzyme turnover. Recent studies using 1-O-methyl alpha-D-galactopyranoside have revealed an unusually large kinetic isotope effect (KIE) for oxidation of the alpha-deuterated al...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010303l
更新日期:2001-06-19 00:00:00
abstract::Light-driven outward sodium-pumping rhodopsin (NaR) was recently found in marine bacteria. Krokinobacter eikastus rhodopsin 2 (KR2) actively transports sodium and lithium ions in NaCl and LiCl, respectively, while it pumps protons in KCl. NaR has a conserved NDQ (N112, D116, and Q123 in KR2) motif, and previous studie...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.6b00741
更新日期:2016-10-18 00:00:00
abstract::The electric organ of the ray, Torpedo ocellata, can serve as a source for both the acetylcholine (ACh) receptor and its ionic channel. The two entities were identified by their specific binding of [3H]ACh and [3H]perhydrohistrionicotoxin ([3H]H12-HTX), respectively. Binding of [3H]H12-HTX was inhibited by certain dru...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00618a023
更新日期:1978-12-12 00:00:00
abstract::The single-stranded packaged genome (ssDNA) of bacteriophage phi X174 is shown by Raman spectroscopy to lack both the ordered phosphodiester backbone and base stacking, which are demonstrated for unpackaged, protein-free ssDNA. In solutions of moderate ionic strength, unpackaged ssDNA contains 36 +/- 7% of deoxyribosy...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00234a004
更新日期:1991-05-21 00:00:00
abstract::The E2 protein of papillomavirus is the key regulator of viral transcription and replication. Dimerization, which takes place via its conserved C-terminal DNA-binding domain (DBD), is critical for these functions. The presence and conservation of two histidines (H290 and H320) at or near the dimer interface suggests t...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0611255
更新日期:2007-02-06 00:00:00
abstract::Protein arginine N-methyltransferases (PRMTs) act in signaling pathways and gene expression by methylating arginine residues within target proteins. PRMT1 is responsible for most cellular arginine methylation activity and can work independently or in collaboration with other PRMTs. In this study, we demonstrate a dire...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi200644c
更新日期:2011-09-27 00:00:00
abstract::The PB1 domain of NBR1 folds via a single pathway mechanism involving two sequential energy barriers separated by a high-energy intermediate. The structural ensemble representing each of the two transition states (TS1 and TS2) has been calculated using experimental Φ values and biased molecular dynamics simulations. B...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi1016793
更新日期:2011-01-11 00:00:00
abstract::Five gangliosides, accounting for over 95% of the total ganglioside fraction, were isolated from bovine adrenal medulla by preparative thin-layer chromatography and the carbohydrate structures determined by a combination of periodate oxidation and permethylation techniques. Partially methylated alditol acetates were g...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00678a026
更新日期:1975-04-08 00:00:00
abstract::Inwardly rectifying potassium channels are important in cellular repolarization of many excitable tissues. Amino acid sequence alignment of different mammalian inward rectifier K(+) channels revealed two absolutely conserved cysteine residues in the putative extracellular face, suggesting a possible disulfide bond. Re...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi992469g
更新日期:2000-04-25 00:00:00
abstract::The photoaffinity reagent 6-azido-L-tryptophan was synthesized by chemical methods. It binds reversibly in the dark to the alpha 2 beta 2 complex of tryptophan synthase of Escherichia coli and forms a quinonoid intermediate with enzyme-bound pyridoxal phosphate (lambda max = 476 nm). The absorbance of this chromophore...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00338a031
更新日期:1985-08-13 00:00:00