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Open AccessJournal ArticleDOI

Nijmegen breakage syndrome.

TLDR
The clinical, immunological, chromosomal, and cell biological findings resemble those in AT, but the clinical findings are quite different and NBS appears to be a separate entity not allelic with AT.
Abstract
Nijmegen breakage syndrome (NBS), a rare autosomal recessive condition also known as ataxia telangiectasia (AT) variants V1 and V2, is characterised by microcephaly, typical facies, short stature, immunodeficiency, and chromosomal instability. We report the clinical, immunological, chromosomal, and cell biological findings in 42 patients who are included in the NBS Registry in Nijmegen. The immunological, chromosomal, and cell biological findings resemble those in AT, but the clinical findings are quite different. NBS appears to be a separate entity not allelic with AT.

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The Mre11 complex: at the crossroads of dna repair and checkpoint signalling.

TL;DR: The Mre 11 complex is a multisubunit nuclease that is composed of Mre11, Rad50 and Nbs1/Xrs2 and its functions in checkpoint signalling and DNA replication are uncovered.
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Association of BRCA1 with the hRad50-hMre11-p95 complex and the DNA damage response

TL;DR: It is shown that BRCA1 interacts in vitro and in vivo with hRad50, which forms a complex with hMre11 and p95/nibrin that is important for the cellular responses to DNA damage that are mediated by the h Rad50-hMre 11-p95 complex.
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DNA Damage Response Pathway Uses Histone Modification to Assemble a Double-Strand Break-Specific Cohesin Domain

TL;DR: It is shown in budding yeast that a single DSB induces the formation of a approximately 100 kb cohesin domain around the lesion, and analyses suggest that the primary DNA damage checkpoint kinases Mec1p and Tel1p phosphorylate histone H2AX to generate a large domain, which is permissive for cohesIn binding.
References
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Journal ArticleDOI

Evolution of ageing.

TL;DR: This work has shown that mortality may be due to an energy-saving strategy of reduced error regulation in somatic cells, which supports Orgel's ‘error catastrophe’ hypothesis and offers a new basis for the study of normal and abnormal ageing syndromes and of apparently immortal transformed cell lines.
Journal ArticleDOI

Evidence for an alternative mechanism for maintaining telomere length in human tumors and tumor-derived cell lines

TL;DR: Evidence is reported for the presence of ALT in a subset of tumor-derived cell lines and tumors, presumably via one or more novel telomere-lengthening mechanisms that the authors refer to as ALT (alternative lengthening of telomeres)
Journal ArticleDOI

Ataxia telangiectasia: a human mutation with abnormal radiation sensitivity

TL;DR: Cell survival experiments are reported which indicate that the clinically observed enhanced sensitivity of AT patients to ionising radiation is manifest at the cellular level.
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Human telomeres contain two distinct Myb-related proteins, TRF1 and TRF2.

TL;DR: TRF2 as discussed by the authors is a distant homologue of TRF1 that carries a very similar Myb-related DNA-binding motif and was found to have similar DNA binding activity and domain organization, but its N terminus was basic rather than acidic.
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