自引率: 4.3%
被引量: 85844
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审稿周期: 1.2
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国人发稿量: 1262
投稿须知/期刊简介:
Biochemical and Biophysical Research Communications is the premier international journal devoted to the very rapid dissemination (six weeks) of timely and significant experimental results in the diverse fields of biological research. Frequent publication (36 issues per year) ensures a steady stream of information. The development of the "Breakthroughs and Views" section brings the minireview format to the journal. In addition, the editors have expanded the journalís scope. Research Areas now include: Biochemistry Cell Biology; Developmental Biology; Immunology; Neurobiology; Biophysics; Molecular Biology; Plant Biology.
期刊描述简介:
Biochemical and Biophysical Research Communications is the premier international journal devoted to the very rapid dissemination of timely and significant experimental results in diverse fields of biological research. The development of the "Breakthroughs and Views" section brings the minireview format to the journal, and issues often contain collections of special interest manuscripts. BBRC is published weekly (52 issues/year). Research Areas now include: • Biochemistry • Bioinformatics • Biophysics • Cancer Research • Cell Biology • Developmental Biology • Immunology • Molecular Biology • Neurobiology • Plant Biology • Proteomics
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Hypoxia-inducible factor 1alpha cDNA cloning and its mRNA and protein tissue specific expression in domestic yak (Bos grunniens) from Qinghai-Tibetan plateau.
Adaptation to hypoxia is regulated by hypoxia-inducible factor 1 (HIF-1), a heterodimeric transcription factor consisting of an oxygen-regulated alpha-subunit and a constitutively expressed beta-subunit. How animals living on Qinghai-Tibetan plateau adapt to the extreme hypoxia environment is known indistinctly. In this study, the Qinghai yak, which has been living at 3000-5000 m altitude for at least two millions of years, was selected as the model of high hypoxia-tolerant adaptation species. The HIF-1alpha ORFs (open reading frames) encoding for two isoforms of HIF-1alpha have been cloned from the brain of the domestic yak. Its expression of HIF-1alpha was analyzed at both mRNA and protein levels in various tissues. Both its HIF-1alpha mRNA and protein are tissue specific expression. Its HIF-1alpha protein's high expression in the brain, lung, and kidney showed us that HIF-1alpha protein may play an important role in the adaptation to hypoxia environment.
被引量：- 发表：1970
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Subcellular localization and regulation of hypoxia-inducible factor-2alpha in vascular endothelial cells.
The hypoxia-inducible factors 1alpha (HIF-1alpha) and 2alpha (HIF-2alpha) have extensive structural homology and have been identified as transcription factors that mediate hypoxia-inducible gene expression through hypoxia-responsive element (HRE). They play critical roles not only in normal development, but also in tumor progression. Endothelial cells (EC) express both HIF-1alpha and -2alpha. In this study, we examined the subcellular localization of HIF-1alpha and -2alpha in bovine arterial EC (BAEC) by immunoblotting and immunocytostaining analysis and found that even under normoxic conditions, as with its heterodimeric partner ARNT, HIF-2alpha was stable, and was localized in the nucleus of BAEC differently than HIF-1alpha. HIF-2alpha might be regulated by a different mechanism than HIF-1alpha and might mediate the expression of some EC-specific genes under normoxic conditions. We further found that cardiovascular helix-loop-helix factor (CHF) 2, which had been identified as an ARNT-interacting protein, was expressed in BAEC and suppressed HRE-dependent gene expression both under normoxia and hypoxia. CHF2 might be one of the key regulators of HIF-2alpha-mediated gene expression in normoxic EC.
被引量：6 发表：2004
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Cloning of hypoxia-inducible factor 1alpha cDNA from chick embryonic ventricular myocytes.
Hypoxia-inducible factor 1 (HIF-1) is composed of HIF-1alpha and arylhydrocarbon nuclear receptor translocator (ARNT), which belong to the basic-helix-loop-helix-Per/ARNT/Sim (bHLH-PAS) family of transcription factors. HIF plays key roles in oxygen homeostasis and embryonic cardiovascular development. In this study, we have cloned cDNAs encoding the chick HIF-1alpha from cultured embryonic ventricular myocytes (CEVM) and then examined its expression in various embryonic tissues. The deduced amino acid sequence of the chick HIF-1alpha cDNA showed 79% identity with that of the human HIF-1alpha cDNA. In contrast, sequence homology between the chick HIF-1alpha and endothelial PAS protein 1 (EPAS1), another member of the bHLH-PAS proteins, was only low (49%). HIF-1alpha mRNA was expressed abundantly in CEVM, but scarcely in the liver, which was quite different from expression pattern of EPAS1 mRNA. These data suggest that HIF-1alpha may be involved in embryonic cardiovascular development. HIF-1alpha and EPAS1 may play distinct roles during developmental stages.
被引量：1 发表：2001
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Expression of the genes encoding the early carotenoid biosynthetic enzymes in Capsicum annuum.
We have shown that both geranylgeranyl pyrophosphate synthase and phytoene synthase from pepper and tomato chromoplasts are very similar in terms of enzymic activity and immunological properties. This enabled us to clone cDNAs specific for phytoene synthase from ripening tomato and pepper fruits and to compare their amino acid sequences with those of bacterial phytoene synthase and yeast squalene synthase. Comparison of the nucleotide sequence of the 3'-untranslated region of the pepper phytoene synthase cDNA suggests that this region was subjected to complex recombination events. RNA gel blot hybridizations revealed that induction of phytoene synthase gene expression is much stronger in tomato than in pepper fruits. In contrast with tomato, 2 phytoene synthase transcripts of different size are present in pepper leaves and fruits. Comparison of the expression pattern of the genes encoding geranylgeranyl pyrophosphate synthase, phytoene synthase and phytoene desaturase revealed that these genes are not co-regulated during pepper fruit ripening.
被引量：31 发表：1993
