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The protein encoded by CYB5A is a membrane-bound cytochrome that reduces ferric hemoglobin (methemoglobin) to ferrous hemoglobin, which is required for stearyl-CoA-desaturase activity. Zusätzlich bieten wir Ihnen Cytochrome B5 Type A (Microsomal) Antikörper (62) und Cytochrome B5 Type A (Microsomal) Kits (15) und viele weitere Produktgruppen zu diesem Protein an.
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A homodimer model can resolve the conundrum as to how cytochrome P450 oxidoreductase (zeige TXNRD1 Proteine) and cytochrome b5 compete for the same binding site on cytochrome P450c17 (zeige CYP17A1 Proteine). (Review)
Data suggest CYP17A1 (zeige CYP17A1 Proteine), with electron donor NADPH-P450 reductase (zeige POR Proteine), is inherently distributive enzyme but that some processivity is present; some 17alpha-hydroxy pregnenolone formed does not dissociate from CYP17A1 (zeige CYP17A1 Proteine) before conversion to dehydroepiandrosterone; CYB5A does not enhance reaction by decreasing k(off) of ligands of CYP17A1 (zeige CYP17A1 Proteine). (CYP17A1 (zeige CYP17A1 Proteine) = cytochrome P450, family 17, subfamily A, polypeptide 1; CYB5A = cytochrome b5)
Data suggest that cytochrome b5 (CYB5) and cytochrome b5 reductase 3 (CYB5R3 (zeige CYB5R3 Proteine)) can reduce human cytoglobin (CYGB (zeige CYGB Proteine)) and zebrafish cytoglobins at rates up to 250-fold higher than those reported for the known physiological substrates, hemoglobin (zeige HBB Proteine) and myoglobin (zeige MB Proteine); the three proteins (CYB5+CYB5R3 (zeige CYB5R3 Proteine)+CYGB (zeige CYGB Proteine)) appear to constitute a metabolon involved in generation of nitric oxide.
Thus, although Mn-b5 binds to CYP17A1 (zeige CYP17A1 Proteine), it is unable to enhance the lyase reaction, strongly suggesting that cyt b5 (zeige CYT-B5 Proteine) has a redox effector role in enhancement of the CYP17A1 (zeige CYP17A1 Proteine) mediated lyase reaction necessary for androgen synthesis.
This study constructed a model of the membrane-bound full-length human P450 (zeige CYP2B6 Proteine) 1A2-cyt b5 (zeige CYT-B5 Proteine) complex. The model was assembled from several parts using a multiscale modeling approach covering all-atom and coarse-grained molecular dynamics (MD).
We conclude that cytochrome b5 can influence the electronic conductivity of cytochrome P450c17 (zeige CYP17A1 Proteine) via allosteric, protein-protein interactions.
Variants in CYB5A and CYB5R3 (zeige CYB5R3 Proteine) should be considered in the evaluation of breast cancer risk in African American women.
CYB5A is the first RA susceptibility gene involved in androgen synthesis. Our functional analysis of SNP rs1790834 indicates that it contributes to the sex bias observed in RA.
both area and ratio of 3betaHSD (zeige HSD3B1 Proteine) and CYB5A double positive cells, which could represent the hybrid cells of zona fasciculate and zona reticularis, are correlated with adrenal development and could influence age-related serum androstenedione levels.
Two acidic residues, Glu (zeige DCTN1 Proteine)-48 and Glu (zeige DCTN1 Proteine)-49, of cytochrome b5 are essential for stimulating the 17,20-lyase activity of CYP17A1 (zeige CYP17A1 Proteine).
The study computes electron transfer rates for the [myoglobin (zeige MB Proteine)(wt), cytochrome b5] complex.
The solution structure of the oxidized cytochrome b(5) mutant V61H.
the effects on the heme microenvironment of cytochrome b(5) caused by the mutation from Val45 to Tyr45, His45 and Glu45
Results from three combined experiments demonstrate that the conserved negatively charged region of cytb5 (zeige CYT-B5 Proteine) surrounding the solvent-exposed heme edge is involved in the binding interaction with horse heart cytochrome c (zeige CYCS Proteine).
From a series of site-directed mutations on Cyt b5 (zeige CYT-B5 Proteine) this report assesses the contributions of amino acid residues that are expected to influence the docking and electron transfer (ET) between Cyt b5 (zeige CYT-B5 Proteine) and horse heart Cyt c (zeige CYCS Proteine).
simulations provided qualitative microscopic explanations of many of the differences in physical properties between outer mitochondrial membrane CYB5 isoform and microsomal CYB5 and two mutants in terms of localized changes in structure and flexibility
Searching the porcine CYB5 gene for mutations, examine its expression, and identify genetic polymorphism in terms of androstenone levels in testis.
the c.-8G>T SNP in the CYB5A gene has a significant but modest effect on boar taint in male pigs and could be useful in some breeds as part of a panel of SNP markers in a marker-assisted selection programme to produce low boar taint pigs
These results demonstrate the differential effects of two forms of CYB5 on the three activities of porcine CYP17A1 (zeige CYP17A1 Proteine) and show that CYB5B (zeige CYB5B Proteine) does not stimulate the andien-beta synthase activity of CYP17A1 (zeige CYP17A1 Proteine).
It was concluded that CYP3A related metabolism in horse is not solely dependent on the expression of the enzyme but also on adequate levels of NADPH P450 reductase (zeige POR Proteine) and cytochrome b(5).
Demonstration of the physiologic importance of cytochrome b5 activating the 17,20-lyase reaction and the production of 19-carbon sex steroids from 21-carbon precursors in mice.
Cytochrome b5 and cytokeratin 17 (zeige KRT17 Proteine) are biomarkers in bronchoalveolar fluid signifying onset of acute lung injury.
Data indicate not only that binding of b5 and P450 reductase (zeige POR Proteine) on the proximal surface of P450 (zeige POR Proteine) 2B4 (zeige CD244 Proteine) results in electron transfer but also that each redox partner transmits unique structural information to the active site proton delivery network.
the observation of weak and nonspecific interactions between CYP2B4 and cytb5 (zeige CYT-B5 Proteine) in micelles suggests that lipid bilayer structures and low curvature membrane surface are preferable for CYP2B4-cytb5 (zeige CYT-B5 Proteine) complex formation.
Data suggest that the cytb5 (zeige CYT-B5 Proteine)-cytP4502B4 complex structure will help unravel the mechanism by which cytb5 (zeige CYT-B5 Proteine) regulates catalysis by cytP4502B4.
Two different types of cytochrome b5 orientations are present within a MFO system: the first allowing potential cytochrome b5 electron donation to P450 (zeige POR Proteine), the second one inducing cytochrome b5 modulation of P450 (zeige POR Proteine) structural changes.
The protein encoded by this gene is a membrane-bound cytochrome that reduces ferric hemoglobin (methemoglobin) to ferrous hemoglobin, which is required for stearyl-CoA-desaturase activity. Defects in this gene are a cause of type IV hereditary methemoglobinemia. Three transcript variants encoding different isoforms have been found for this gene.
, type 1 cyt-b5
, cytochrome b-5
, cytochrome b5 type A (microsomal)
, cytochrome b5A microsomal