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[Molecular defect of ceruloplasmin synthesis and maturation in Wilson-Konovalov disease]. 1982

L V Puchkova, and V G Vakharlovskiĭ, and V S Gaĭtskhoki, and N K Monakhov, and A L Shvartsman

The radioimmunochemical study of ceruloplasmin-synthesizing polyribosomes was carried out using bioptic liver specimens obtained from fourteen homozygous patients with hepatolenticular degeneration (Wilson--Konovalov disease) and from eight control patients with various non-hereditary diseases. The measurement of binding of 125I-antibodies to the nascent polysome-bound ceruloplasmin chains demonstrated that in control patients this protein is only synthesized on membrane-bound polysomes, while free polysomes do not contribute to the synthesis of ceruloplasmin. The majority of homozygous carriers of Wilson--Konovalov mutation (eleven of fourteen) are characterized by the involvement of free, rather than membrane-bound polysomes, in the synthesis of ceruloplasmin. This shift of ceruloplasmin synthesis from membrane-bound to free polysomes seems to be accompanied by disturbances in the cotranslational proteolytic maturation of ceruloplasmin from its biosynthetic precursors. As a result of this defect, a putative of ceruloplasmin (preproceruloplasmin) was detected in the content of Golgi complex as well as in the serum of homozygous patients. This precursor of a molecular weight 84,000 was found neither in Golgi complex, nor in the serum of control subjects.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008107 Liver Diseases Pathological processes of the LIVER. Liver Dysfunction,Disease, Liver,Diseases, Liver,Dysfunction, Liver,Dysfunctions, Liver,Liver Disease,Liver Dysfunctions
D008297 Male Males
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D011132 Polyribosomes A multiribosomal structure representing a linear array of RIBOSOMES held together by messenger RNA; (RNA, MESSENGER); They represent the active complexes in cellular protein synthesis and are able to incorporate amino acids into polypeptides both in vivo and in vitro. (From Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed) Polysomes,Polyribosome,Polysome
D002570 Ceruloplasmin A multi-copper blood FERROXIDASE involved in iron and copper homeostasis and inflammation. Caeruloplasmin,Ferroxidase,Ceruloplasmin Ferroxidase,Ceruloplasmin Oxidase,Ferroxidase I,alpha(2)-Ceruloplasmin,Ferroxidase, Ceruloplasmin,Oxidase, Ceruloplasmin
D002908 Chronic Disease Diseases which have one or more of the following characteristics: they are permanent, leave residual disability, are caused by nonreversible pathological alteration, require special training of the patient for rehabilitation, or may be expected to require a long period of supervision, observation, or care (Dictionary of Health Services Management, 2d ed). For epidemiological studies chronic disease often includes HEART DISEASES; STROKE; CANCER; and diabetes (DIABETES MELLITUS, TYPE 2). Chronic Condition,Chronic Illness,Chronically Ill,Chronic Conditions,Chronic Diseases,Chronic Illnesses,Condition, Chronic,Disease, Chronic,Illness, Chronic
D004792 Enzyme Precursors Physiologically inactive substances that can be converted to active enzymes. Enzyme Precursor,Proenzyme,Proenzymes,Zymogen,Zymogens,Precursor, Enzyme,Precursors, Enzyme
D006056 Golgi Apparatus A stack of flattened vesicles that functions in posttranslational processing and sorting of proteins, receiving them from the rough ENDOPLASMIC RETICULUM and directing them to secretory vesicles, LYSOSOMES, or the CELL MEMBRANE. The movement of proteins takes place by transfer vesicles that bud off from the rough endoplasmic reticulum or Golgi apparatus and fuse with the Golgi, lysosomes or cell membrane. (From Glick, Glossary of Biochemistry and Molecular Biology, 1990) Golgi Complex,Apparatus, Golgi,Complex, Golgi
D006527 Hepatolenticular Degeneration A rare autosomal recessive disease characterized by the deposition of copper in the BRAIN; LIVER; CORNEA; and other organs. It is caused by defects in the ATP7B gene encoding copper-transporting ATPase 2 (EC 3.6.3.4), also known as the Wilson disease protein. The overload of copper inevitably leads to progressive liver and neurological dysfunction such as LIVER CIRRHOSIS; TREMOR; ATAXIA and intellectual deterioration. Hepatic dysfunction may precede neurologic dysfunction by several years. Cerebral Pseudosclerosis,Neurohepatic Degeneration,Pseudosclerosis,Wilson Disease,Copper Storage Disease,Hepatic Form of Wilson Disease,Hepato-Neurologic Wilson Disease,Hepatocerebral Degeneration,Hepatolenticular Degeneration Syndrome,Kinnier-Wilson Disease,Progressive Lenticular Degeneration,Westphal-Strumpell Syndrome,Wilson Disease, Hepatic Form,Wilson's Disease,Cerebral Pseudoscleroses,Copper Storage Diseases,Degeneration Syndrome, Hepatolenticular,Degeneration Syndromes, Hepatolenticular,Degeneration, Hepatocerebral,Degeneration, Hepatolenticular,Degeneration, Neurohepatic,Degeneration, Progressive Lenticular,Degenerations, Hepatocerebral,Degenerations, Neurohepatic,Disease, Copper Storage,Diseases, Copper Storage,Diseases, Hepato-Neurologic Wilson,Diseases, Kinnier-Wilson,Hepato Neurologic Wilson Disease,Hepato-Neurologic Wilson Diseases,Hepatocerebral Degenerations,Hepatolenticular Degeneration Syndromes,Kinnier Wilson Disease,Kinnier-Wilson Diseases,Lenticular Degeneration, Progressive,Neurohepatic Degenerations,Pseudoscleroses, Cerebral,Pseudosclerosis, Cerebral,Storage Disease, Copper,Storage Diseases, Copper,Syndrome, Hepatolenticular Degeneration,Syndromes, Hepatolenticular Degeneration,Westphal Strumpell Syndrome,Westphal-Strumpell Syndromes,Wilson Disease, Hepato-Neurologic,Wilson Diseases, Hepato-Neurologic,Wilsons Disease

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