SAXS and SANS observations of abnormal aggregation of human •-crystallin

Masaaki Sugiyama, Norihiko Fujii, Yukio Morimoto, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga, Noriko Fujii

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7 Citations (Scopus)


Aggregation states of human α-crystallins are observed complementarily using small-angle X-ray and small-angle neutron scatterings (SAXS and SANS). Infant α-crystallin is almost a monodispersed system of the aggregates with gyration radius of ca. 60 Å, which is a normal aggregate. On the other hand, the aged and cataract α-crystallins have not only the normal but also the larger aggregates. In the aged alpha;-crystallin, the normal aggregate is a major component, but in the cataract α-crystallin the larger ones are dominant. Both αA- and alpha;B-crystallins, which are subunits of α-crystallin, also form an aggregate with the size close to the normal aggregate. Under UV irradiation, only aggregates of αB-crystallin undergo further aggregation. Therefore, considering increase of ratio of αB-crystallin in the aggregate of alpha;-crystallin as aging, the abnormal aggregation (formation of the huge aggregates) mainly results in the further aggregation of alpha;B-crystallin caused by external stresses.

Original languageEnglish
Pages (from-to)1380-1388
Number of pages9
JournalChemistry and Biodiversity
Issue number6
Publication statusPublished - Jun 2010
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Biochemistry
  • Chemistry(all)
  • Molecular Medicine
  • Molecular Biology


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