1. Interactions among members of the Bcl-2 protein family analyzed with a yeast two-hybrid system.

Interactions of the Bcl-2 protein with itself and other members of the Bcl-2 family, including Bcl-X-L, Bcl-X-S, Mcl-1, and Bax, were explored with a yeast two-hybrid system. Fusion proteins were created by linking Bcl-2 family proteins to a LexA DNA-binding domain or a B42 trans-activation domain. Protein-protein interactions were examined by expression of

2. Bcl-2 is a monomeric protein: prevention of homodimerization by structural constraints

The pro-apoptotic activity of the Bcl–2 family member Bax has been shown to be facilitated by homodimerization. However, it is unknown whether Bcl–2 or Bcl–xL have to homodimerize to protect cells from apoptosis. Here we show by co-immunoprecipitation and FPLC analyses that while Bax multimerizes and forms heterodimers with Bcl–2, there is no evidenc

Oxford University Press.

3. Bcl-xL/Bcl-2 coordinately regulates apoptosis, cell cycle arrest and cell cycle entry

Bcl-xL and Bcl-2 inhibit both apoptosis and proliferation. In investigating the relationship between these two functions of Bcl-xL and Bcl-2, an analysis of 24 Bcl-xL and Bcl-2 mutant alleles, including substitutions at residue Y28 previously reported to selectively abolish the cell cycle activity, showed that cell cycle delay and anti-apoptosis co-segregate

Oxford University Press.

4. Apoptosis Triggered by Myc-Induced Suppression of Bcl-XL or Bcl-2 Is Bypassed during Lymphomagenesis

Enforced Bcl-2 expression inhibits Myc-induced apoptosis and cooperates with Myc in transformation. Here we report that the synergy between Bcl-2 and Myc in transforming hematopoietic cells in fact reflects a Myc-induced pathway that selectively suppresses the expression of the Bcl-XL or Bcl-2 antiapoptotic protein. Myc activation suppresses Bcl-XL RNA and p

American Society for Microbiology.

5. Inibição simultânea dos genes antiapoptóticos Bcl-2 e Bcl-XL em células de leucemia  linfoide aguda e células de linfoma do manto mediante RNA de interferência / Simultaneous inhibition of antiapoptóticosBcl-2 and Bcl-XL genes acute lymphocytic leukemia and mantle cell lymphoma by RNA interference

As estatísticas relacionadas aos cânceres hematológicos indicam que a incidência e mortalidade dessas doenças têm aumentado ao longo dos anos. Embora a maioria dos casos de linfomas e leucemias não possua etiologia definida, sugere-se que fatores genéticos possam estar envolvidos. Nesse contexto, destaca-se a família de proteínas Bcl-2, divididas e

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/11/2012

6. A Bcl-2 homolog encoded by Kaposi sarcoma-associated virus, human herpesvirus 8, inhibits apoptosis but does not heterodimerize with Bax or Bak

The Bcl-2 protein family is characterized by the ability to modulate cell death, and members of this family share two highly conserved domains called Bcl-2 homology 1 (BH1) and 2 (BH2) which have been shown to be critical for the death-repressor activity of Bcl-2 and Bcl-xL. Through sequence analysis we identified a novel viral Bcl-2 homolog, designated KSbc

The National Academy of Sciences of the USA.

7. Bcl-2 and Bcl-XL serve an anti-inflammatory function in endothelial cells through inhibition of NF-κB

To maintain the integrity of the vascular barrier, endothelial cells (EC) are resistant to cell death. The molecular basis of this resistance may be explained by the function of antiapoptotic genes such as bcl family members. Overexpression of Bcl-2 or Bcl-XL protects EC from tumor necrosis factor (TNF)–mediated apoptosis. In addition, Bcl-2 or Bcl-XL inhi

American Society for Clinical Investigation.

8. Bcl-2 prevents apoptotic mitochondrial dysfunction by regulating proton flux

We and others have recently shown that loss of the mitochondrial membrane potential (Δψ) precedes apoptosis and chemical-hypoxia-induced necrosis and is prevented by Bcl-2. In this report, we examine the biochemical mechanism used by Bcl-2 to prevent Δψ loss, as determined with mitochondria isolated from a cell line overexpressing human Bcl-2 or from liv

The National Academy of Sciences.

9. Association of Insulin Receptor Substrate Proteins with Bcl-2 and Their Effects on Its Phosphorylation and Antiapoptotic Function

Insulin receptor substrate (IRS) proteins are docking proteins that couple growth factor receptors to various effector molecules, including phosphoinositide-3 kinase, Grb-2, Syp, and Nck. Here we show that IRS-1 associates with the loop domain of Bcl-2 and synergistically up-regulates antiapoptotic function of Bcl-2. IRS-2 but not IRS-3 binds to Bcl-2, and I

The American Society for Cell Biology.

10. Analysis of the structure, transcripts, and protein products of bcl-2, the gene involved in human follicular lymphoma.

We have determined that the bcl-2 (B-cell leukemia/lymphoma 2) gene is transcribed into three overlapping mRNAs, and we have cloned bcl-2 cDNA sequences. Sequence analysis of the bcl-2 cDNA clones and comparison of their sequences to their genomic counterparts indicate that the bcl-2 gene contains at least two exons. The three bcl-2 transcripts, which are 8.

11. bcl-x is expressed in embryonic and postnatal neural tissues and functions to prevent neuronal cell death.

Previous studies have implicated the bcl-2 protooncogene as a potential regulator of neuronal survival. However, mice lacking functional bcl-2 exhibited normal development and maintenance of the central nervous system (CNS). Since bcl-2 appears dispensable for neuronal survival, we have examined the expression and function of bcl-x, another member of the bcl

12. Context-dependent Bcl-2/Bak Interactions Regulate Lymphoid Cell Apoptosis*

The release of cytochrome c from mitochondria, which leads to activation of the intrinsic apoptotic pathway, is regulated by interactions of Bax and Bak with antiapoptotic Bcl-2 family members. The factors that regulate these interactions are, at the present time, incompletely understood. Recent studies showing preferences in binding between synthetic Bcl-2

American Society for Biochemistry and Molecular Biology.