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New Fashion Design for Merck - L-Methionine Cas: 63-68-3 99% White crystalline powder – XD BIOCHEM

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New Fashion Design for Merck - L-Methionine Cas: 63-68-3 99% White crystalline powder – XD BIOCHEM Detail:

Catalog Number XD90287
Product Name L-Methionine

CAS

63-68-3

Molecular Formula

C5H11NO2S

Molecular Weight

149.21134
Storage Details Ambient

Harmonized Tariff Code

29304010

 

Product Specification

Assay 98% – 101.5%
Appearance White crystals or crystalline powder
Conclusion  
Identification Meets the requirement
pH 5.6 – 6.1
Loss on Drying ≤ 0.3%
Sulfate (SO4) ≤ 0.03%
Iron ≤ 0.003%
Residue on Ignition ≤ 0.4%
Chloride ≤ 0.05%
Heavy Metal ≤ 0.0015%
Chromotograhic Purity Not more than 2.0% of total impurities is found
Specific rotation [ α ] D 2 5 +22.4º ~ +24.7º

 

Our previous studies have revealed its crucial roles in both early and late stages of KSHV infection. In this study, we surveyed the interactome of ORF45 using a panel of monoclonal antibodies. In addition to the previously identified extracellular regulated kinase (ERK) and p90 ribosomal S6 kinase (RSK) proteins, we found several other copurified proteins, including prominent ones of ∼38 kDa and ∼130 kDa. Mass spectrometry revealed that the 38-kDa protein is viral ORF33 and the 130-kDa protein is cellular USP7 (ubiquitin-specific protease 7). We mapped the ORF33-binding domain to the highly conserved carboxyl-terminal 19 amino acids (aa) of ORF45 and the USP7-binding domain to the reported consensus motif in the central region of ORF45. Using immunofluorescence staining, we observed colocalization of ORF45 with ORF33 or USP7 both under transfected conditions and in KSHV-infected cells. Moreover, we noticed ORF45-dependent relocalization of a portion of ORF33/USP7 from the nucleus to t he cytoplasm. We found that ORF45 caused an increase in ORF33 protein accumulation that was abolished if either the ORF33- or USP7-binding domain in ORF45 was deleted. Furthermore, deletion of the conserved carboxyl terminus of ORF45 in the KSHV genome drastically reduced the level of ORF33 protein in KSHV-infected cells and abolished production of progeny virions. Collectively, our results not only reveal new components of the ORF45 interactome, but also demonstrate that the interactions among these proteins are crucial for KSHV lytic replication.Kaposi’s sarcoma-associated herpesvirus (KSHV) is the causative agent of several human cancers. KSHV ORF45 is a multifunctional protein that is required for KSHV lytic replication, but the exact mechanisms by which ORF45 performs its critical functions are unclear. Our previous studies revealed that all ORF45 protein in cells exists in high-molecular-weight complexes. We therefore sought to characterize the interactome of ORF45 to provide ins ights into its roles during lytic replication. Using a panel of monoclonal antibodies, we surveyed the ORF45 interactome in KSHV-infected cells. We identified two new binding partners of ORF45: the viral protein ORF33 and cellular ubiquitin-specific protease 7 (USP7). We further demonstrate that the interaction between ORF45 and ORF33 is crucial for the efficient production of KSHV viral particles, suggesting that the targeted interference with this interaction may represent a novel strategy to inhibit KSHV lytic replication.


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New Fashion Design for Merck - L-Methionine  Cas: 63-68-3  99%  White  crystalline powder – XD BIOCHEM detail pictures


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    New Fashion Design for Merck - L-Methionine Cas: 63-68-3 99% White crystalline powder – XD BIOCHEM