Recombinant Human Charged multivesicular body protein 4b (CHMP4B)

Code CSB-EP887976HU
Size US$306
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  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.

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Product Details

Purity
Greater than 90% as determined by SDS-PAGE.
Target Names
CHMP4B
Uniprot No.
Research Area
others
Alternative Names
Charged multivesicular body protein 4b; CHM4B_HUMAN; chmp4b; Chromatin-modifying protein 4b; hSnf7-2; hVps32-2; SNF7 homolog associated with Alix 1; SNF7-2; Vacuolar protein sorting-associated protein 32-2; Vps32-2
Species
Homo sapiens (Human)
Source
E.coli
Expression Region
1-224aa
Target Protein Sequence
SVFGKLFGAGGGKAGKGGPTPQEAIQRLRDTEEMLSKKQEFLEKKIEQELTAAKKHGTKNKRAALQALKRKKRYEKQLAQIDGTLSTIEFQREALENANTNTEVLKNMGYAAKAMKAAHDNMDIDKVDELMQDIADQQELAEEISTAISKPVGFGEEFDEDELMAELEELEQEELDKNLLEISGPETVPLPNVPSIALPSKPAKKKEEEDDDMKELENWAGSM
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight
51.8kDa
Protein Length
Full Length
Tag Info
N-terminal GST-tagged
Form
Liquid or Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer
If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA
Please contact us to get it.

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Target Background

Function
Probable core component of the endosomal sorting required for transport complex III (ESCRT-III) which is involved in multivesicular bodies (MVBs) formation and sorting of endosomal cargo proteins into MVBs. MVBs contain intraluminal vesicles (ILVs) that are generated by invagination and scission from the limiting membrane of the endosome and mostly are delivered to lysosomes enabling degradation of membrane proteins, such as stimulated growth factor receptors, lysosomal enzymes and lipids. The MVB pathway appears to require the sequential function of ESCRT-O, -I,-II and -III complexes. ESCRT-III proteins mostly dissociate from the invaginating membrane before the ILV is released. The ESCRT machinery also functions in topologically equivalent membrane fission events, such as the terminal stages of cytokinesis. Together with SPAST, the ESCRT-III complex promotes nuclear envelope sealing and mitotic spindle disassembly during late anaphase. Plays a role in the endosomal sorting pathway. ESCRT-III proteins are believed to mediate the necessary vesicle extrusion and/or membrane fission activities, possibly in conjunction with the AAA ATPase VPS4. When overexpressed, membrane-assembled circular arrays of CHMP4B filaments can promote or stabilize negative curvature and outward budding. CHMP4A/B/C are required for the exosomal release of SDCBP, CD63 and syndecan.; (Microbial infection) The ESCRT machinery also functions in topologically equivalent membrane fission events, such as the budding of enveloped viruses (HIV-1 and other lentiviruses). Via its interaction with PDCD6IP involved in HIV-1 p6- and p9-dependent virus release.
Gene References into Functions
  1. Data (including data from studies using transgenic mice) suggest that the process leading to microparticle release from cardiac myocytes involves recruitment of CHMP4B protein to the forming microparticle membrane which also contains cBIN1; plasma cBIN1 is reduced in patients with heart failure as compared to control subjects. (CHMP4B = charged multivesicular body protein 4B; cBIN1 = cardiac bridging integrator 1) PMID: 28806752
  2. homologous domain of human Bro1 domain-containing proteins, Alix and Brox, binds CHMP4B but not STAM2, despite their high structural similarity PMID: 26866605
  3. our results implied that CHMP4B could be a promising prognostic biomarker as well as a potential therapeutic target of HCC. PMID: 25874485
  4. CHMP4B, through its association with chromatin, may participate in the autophagolysosomal degradation of micronuclei and other extranuclear chromatin. PMID: 24741567
  5. hSnf7-1 and hSnf7-2 are preferentially associated with CHMP2A and CHMP2B, respectively, and regulate the turnover of distinct transmembrane cargos such as neurotransmitter receptors in human neurons. PMID: 21975012
  6. CHMP4b and Alix participate in formation of multivesicular bodies by cooperating with SKD1 PMID: 12860994
  7. ALIX can have a dramatic effect on HIV-1 release by binding at the CHMP4B site; the ability to use ALIX may allow HIV-1 to replicate in cells that express only low levels of Tsg101 PMID: 17428861
  8. These data provide the first evidence that CHMP4B plays a vital role the maintenance of lens transparency. PMID: 17701905
  9. Results suggest that efficient interaction between CHMP4s and Brox requires Brox farnesylation. PMID: 18190528
  10. Study demonstrates that CHMP4A and CHMP4B proteins form novel membrane-attached filaments that can promote or stabilize negative curvature and outward budding. PMID: 18209100
  11. The Bro1 domain of ALIX binds specifically to C-terminal residues of the human CHMP4B. PMID: 18511562
  12. The CHMP4b- and Src-docking sites in the Bro1 domain are autoinhibited in the native state of Alix. PMID: 19016654

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Involvement in disease
Cataract 31, multiple types (CTRCT31)
Subcellular Location
Cytoplasm, cytosol. Late endosome membrane; Peripheral membrane protein. Midbody. Nucleus envelope.
Protein Families
SNF7 family
Tissue Specificity
Widely expressed. Expressed at higher level in heart and skeletal muscle. Also expressed in brain, colon, thymus, spleen, kidney, liver, small intestine, placenta, lung and peripheral blood lymphocytes.
Database Links

HGNC: 16171

OMIM: 605387

KEGG: hsa:128866

STRING: 9606.ENSP00000217402

UniGene: Hs.472471

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