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- SASDC63: Fowlpox Virus FPV039 antiapoptotic Bcl-2 viral protein in complex... -
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Basic information
Entry | ![]() |
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![]() | Fowlpox Virus FPV039 antiapoptotic Bcl-2 viral protein in complex with BaK BH3 peptide (FPV039:BAK)
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Function / homology | ![]() Activation and oligomerization of BAK protein / Release of apoptotic factors from the mitochondria / : / response to mycotoxin / B cell negative selection / BAK complex / activation of cysteine-type endopeptidase activity involved in apoptotic process by cytochrome c / apoptotic process involved in blood vessel morphogenesis / response to fungus / negative regulation of endoplasmic reticulum calcium ion concentration ...Activation and oligomerization of BAK protein / Release of apoptotic factors from the mitochondria / : / response to mycotoxin / B cell negative selection / BAK complex / activation of cysteine-type endopeptidase activity involved in apoptotic process by cytochrome c / apoptotic process involved in blood vessel morphogenesis / response to fungus / negative regulation of endoplasmic reticulum calcium ion concentration / limb morphogenesis / post-embryonic camera-type eye morphogenesis / establishment or maintenance of transmembrane electrochemical gradient / B cell apoptotic process / activation of cysteine-type endopeptidase activity / positive regulation of endoplasmic reticulum unfolded protein response / regulation of mitochondrial membrane permeability / fibroblast apoptotic process / mitochondrial fusion / myeloid cell homeostasis / positive regulation of calcium ion transport into cytosol / pore complex / thymocyte apoptotic process / negative regulation of peptidyl-serine phosphorylation / vagina development / B cell homeostasis / host cell mitochondrion / intrinsic apoptotic signaling pathway in response to endoplasmic reticulum stress / blood vessel remodeling / extrinsic apoptotic signaling pathway in absence of ligand / release of cytochrome c from mitochondria / regulation of mitochondrial membrane potential / response to gamma radiation / positive regulation of protein-containing complex assembly / cellular response to mechanical stimulus / intrinsic apoptotic signaling pathway in response to DNA damage / cellular response to UV / regulation of apoptotic process / mitochondrial outer membrane / transmembrane transporter binding / cell population proliferation / regulation of cell cycle / positive regulation of apoptotic process / protein heterodimerization activity / endoplasmic reticulum / protein homodimerization activity / cytosol Similarity search - Function |
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![]() | ![]() Title: Structural basis of apoptosis inhibition by the fowlpox virus protein FPV039. Authors: Mohd Ishtiaq Anasir / Sofia Caria / Michael A Skinner / Marc Kvansakul / ![]() ![]() Abstract: Programmed cell death or apoptosis of infected host cells is an important defense mechanism in response to viral infections. This process is regulated by proapoptotic and prosurvival members of the B- ...Programmed cell death or apoptosis of infected host cells is an important defense mechanism in response to viral infections. This process is regulated by proapoptotic and prosurvival members of the B-cell lymphoma 2 (Bcl-2) protein family. To counter premature death of a virus-infected cell, poxviruses use a range of different molecular strategies including the mimicry of prosurvival Bcl-2 proteins. One such viral prosurvival protein is the fowlpox virus protein FPV039, which is a potent apoptosis inhibitor, but the precise molecular mechanism by which FPV039 inhibits apoptosis is unknown. To understand how fowlpox virus inhibits apoptosis, we examined FPV039 using isothermal titration calorimetry, small-angle X-ray scattering, and X-ray crystallography. Here, we report that the fowlpox virus prosurvival protein FPV039 promiscuously binds to cellular proapoptotic Bcl-2 and engages all major proapoptotic Bcl-2 proteins. Unlike other identified viral Bcl-2 proteins to date, FPV039 engaged with cellular proapoptotic Bcl-2 with affinities comparable with those of Bcl-2's endogenous cellular counterparts. Structural studies revealed that FPV039 adopts the conserved Bcl-2 fold observed in cellular prosurvival Bcl-2 proteins and closely mimics the structure of the prosurvival Bcl-2 family protein Mcl-1. Our findings suggest that FPV039 is a pan-Bcl-2 protein inhibitor that can engage all host BH3-only proteins, as well as Bcl-2-associated X, apoptosis regulator (Bax) and Bcl-2 antagonist/killer (Bak) proteins to inhibit premature apoptosis of an infected host cell. This work therefore provides a mechanistic platform to better understand FPV039-mediated apoptosis inhibition. |
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Structure visualization
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Downloads & links
-Data source
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-Related structure data
Related structure data | ![]() 5tzpC ![]() 5tzqC C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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External links
Related items in Molecule of the Month |
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-Models
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Sample
![]() | Name: Fowlpox Virus FPV039 antiapoptotic Bcl-2 viral protein in complex with BaK BH3 peptide (FPV039:BAK) Specimen concentration: 0.31-7.35 / Entity id: 631 / 632 |
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Buffer | Name: 20 mM trisodium citrate pH, 200 mM NaCl / pH: 6 |
Entity #631 | Name: FPV039 / Type: protein / Description: Bcl-2-like protein FPV039 / Formula weight: 16.823 / Num. of mol.: 1 / Source: Fowlpox virus (strain NVSL) / References: UniProt: Q9J5G4 Sequence: MASSNMKDET YYIALNMIQN YIIEYNTNKP RKSFVIDSIS YDVLKAACKS VIKTNYNEFD IIISRNIDFN VIVTQVLEDK INWGRIITII AFCAYYSKKV KQDTSPQYYD GIISEAITDA ILSKYRSWFI DQDYWNGIRI YKN |
Entity #632 | Name: Bak / Type: protein / Description: Uncharacterized protein (BAK1) / Formula weight: 2.805 / Num. of mol.: 1 / Source: Gallus gallus / References: UniProt: Q5F404 Sequence: LGSTGSQVGR RLAIIGDDIN KRYDAE |
-Experimental information
Beam | Instrument name: Australian Synchrotron SAXS/WAXS / City: Melbourne / 国: Australia ![]() | |||||||||||||||
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Detector | Name: Pilatus 1M | |||||||||||||||
Scan | Measurement date: Oct 2, 2015 / Storage temperature: 20 °C / Cell temperature: 20 °C / Exposure time: 1 sec. / Number of frames: 30 / Unit: 1/A /
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Result | Experimental MW: 17.9 kDa / Type of curve: single_conc
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