M1: Specific Proteins (additional) Flashcards
In plasma protein, 35-50g/L is
Albumin
Concentration of plasma proteins
65-80g/L
Amount of serum globulins which consist of transport proteins, reactants of acute phase & globulins
20-35g/L
How albumin is degraded
Hepatocytes, mononuclear phagocytic system (complexes of antigen-antibody, hemoglobin-haptoglobin.
Biosynthesis of plasma proteins: most responsible
Liver
Biosynthesis of plasma proteins: immunoglobulins
Lymphocytes
Types of plasma proteins
Albumin, Globulin & Fibrinogen
Protein moves in an electric field according to their charge & size
Electrophoresis of plasma proteins
Main component of the globulin which contain its bulk
Albumin
Carry fatty acids, bilirubin, calcium & drugs
Albumin
Colloidal and non diffusable and exert a coloidal osmotic preessure. Catalytic functions. Most impt in regulation of colloidal and oncotic pressure.
Albumin
Protective function which combine with foreign antigens and remove them.
Immunoglobulins
Protects the lung tissue
A1 antitrypsin
Breaks down thrombin and dissolves clot
Plasmin
Plasma proteins are mostly synthesized in the
Liver
Immunoglobulins are synthesized in the
Plasma cells
Exception as glycoprotein
Albumin
Conditions like cell destruction, reversible cell damage & metabolic activation
Acute Phase Reactants
Fraction that migrates in a position faster than albumin toward the anode. Tetrameric structure with a total MW of 62000 Da, each monomer can bind a molecule of thyroxine.
Prealbumin
Small fraction of thyroxine is bound to TBPA because TBG has 100x greater affinity for thyroxine.
Transthyretin/TBPA (TTR)
Role in metabolism in Vitamin which form a complex with RBP. Rich in tryptophan. Short half life 2 days.
Pre albumin
Disease affecting pre albumin
Type I Familial Amyloidotic Polyneuropathy
2/3 of total protein. Mobile repository of AA for incorporation into other proteins.
Albumin
Biosynthesis of plasma proteins:
Analbuminemia
Major component of the a1-globulins is the protease inhibitor AAT combine with and inactive trypsin
A1 antitrypsin
Released following inflammation responding to irritants
Elastase
Best procedure to measure albumin, haptoglobin & complement
Mephelometry
Largest major nonimmunoglobulin in plasma, MW 725 000 Da comparable to that of the major protease inhibitor AAT, although women have higher levels than men in response to estrogen.
A2- macroglobulin
A2- macroglobulin are high in what condition. More than 3g/dL
Nephrotic syndrome
AM2 can be identified by
Isoelectric focusing
Form a complex. No globin. See bubbles due to release of catalase.
Haptoglobin
Bubbles of oxygen due to
Catalase
Circulation of haptoglobin
Reticulo endothelial system
Can fresh or stored. C3 cleaved to for C3c them migrate to go to b-globulins
Complement
Complement deficient protein diseases
Autoimmune
More appreciated in electrophoresis
C3
Most abundant of the coagulation factors and which forms fibrin clot
Fibrinogen
Produces covalent bonds between lysine and glutamine residues. A crosslinked clot is refractory to dissolution.
Factor XIII
Functionally deformed fibrinogen. Bleeding problem and more prone to formation of thrombus or clot.
Dysfibrinogenemias
Essentially no fibrinogen is synthesized results in hemorrhagic disorder
Congenital Fibrinogenemia
Is a copper binding protein and exhibit oxidase activity. Low at birth and increases in pregnancy, blue color copper then react to yellow chromagens.
Ceruloplasmin
Greenish if impaired
Ceruloplasmin
Hepatolenticular degeneration
Wilson’s dse
Group specific component globulin. Decreased in sever liver disease. D binding protein. In middle of albumin and gamma. Can be found in nephrotic syndrome.
Vitamin D
Methods for Vit D
Rocket, radioimmunoassay
Orosomucoid High CHO content. Binds to drugs like lidocaine. Acute phase reactants.
A1 acid Glycoprotein
Pneumococcal infections, rises strikingly whenever there is tissue necrosis. Capacity to precipitate the C substance.
CRP
Highly specific for neutralizing chymotrypsin which cleaves peptide bonds at the carboxyl side of tyrosine and phenylalanine residue
AAC
Response to inflammatory or stressful states that occur with infection or anything that has something to do with
APRs
Due to malnutrition or gross loss of protein
Hypoproteinemia
Cut off for nephrotic syndrome albumin
3
Loss of transferrin
Iron deficiency anemia
Transferrin band forms a narrow clonal
Myeloma protein