Biochem Flashcards
Diseases associated with FA Synthesis/Oxidation
Myopathic CAT/CPT deficiencyMedium Chain Acyl-dehydrogenase deficiency
What does Aminopeptidase cut?
Right of any AA on the amino terminal
Hunter’s
Iduronidase deficiency XRMilder(MPS II)
Diseases associated with Pyruvate Metabolism
Pyruvate Dehydrogenase deficiency
Peak level
4 hours after dose (if too high, decrease dose)
RLE Purine Synthesis
PRPP Synthase
Lateral leg bowing
Ricketts
RLE Urea Cycle
CPS-1
Where does the Pro label send stuff to?
Golgi
Galactosemia
Galactose-1-uridyl-transferase deficiency Cataracts MRLiver damage
Von Gierke’s
Glucose-6-phosphatase deficiency HypoglycemiaHepatosplenomegaly
Osteogenesis Imperfecta presentation
Shattered bones Blue sclera
Diseases associated with Ketone Body Metabolism
DKA, Alcoholic Ketoacidosis
RLE Glycogenolysis
Glycogen Phosphorylase
Ketogenic
Made from and broken down to Acetyl CoALysine and Leucine
Essential FA
Linolenic AcidLinoleic Acid
First Order Kinetics
Constant drug percentage metabolized over timeDependent on concentration
Ehlers Danlos presentation
Hyperstretchable skinHyperextensible joints
Scleroderma presentation
Tight skin
Anderson’s
Branching enzyme deficiencyLong chains of glycogen
Nonsense Mutation
Early stop codon
Lysosomal diseases with gargoyle face
Gaucher’s Hurler’s
Both Ketogenic and Glucogenic
PITTPhenylalanineIsoleucine Threonine Tryptophan
Marfan’s presentation
Wing span longer than heightArachnodactyly Aortic root dilation, aortic aneurysm MVPDislocated lens from the bottom (look up)
Diseases associated with Urea Cycle
CPS deficiencyOrnithine Transcarbamoylase deficiency
Western Blot
Protein
Pellagra
Niacin (B3) deficiency DiarrheaDermatitisDementiaDeath
Gaucher’s
Glucocerebrosidase deficiency Wrinkled tissue - crumpled paper macrophageBone pain
Albinism
Tyrosinase deficiencyNo tyrosine to melanin
Essential Fructosuria
Fructokinase deficiencyExcrete fructose (still have hexokinase)
Frameshift Mutation
+/- 1 or 2 bases
Kd
Concentration of drug that binds 50% of receptors
Essential AA
PVT TIM HALLPhenylalanineValineTryptophan Threonine Isoleucine Methionine Histidine Arginine LysineLeucine
Diseases associated with Gluconeogenesis
Von Gierke’s
Carboxylase
Forms C-C bond using ATP and Biotin
Hydrophobic AA
ValineAlanineIsoleucine
Noncompetitive Inhibition
Binds at regulatory site, efficacy decreases, Vmax decreases, Km no change
Difference between Heterochromatin and Euchromatin
H = tight (inactive)E = loose (active)
Where does the N-terminal sequence send stuff to?
Mitochondria
Marasmus
Calorie deficiency SkinnyStarvation
RLE Beta-Oxidation
CAT-1
Point Mutation
Change in one base
Southern Blot
DNA
What does Carboxypeptidase cut?
Left of any AA on the carboxy terminal
Exothermic reaction
Gives off heat
What AAs does Acid Hydrolysis cut?
Asparagine Glutamine
Lesch-Nyhan
HGPRT deficiencyGoutNeuropathySelf-mutilation
What AAs do Chymotrypsin cut?
PhenylalanineTyrosineTryptophan
RLE Gluconeogenesis
Pyruvate Carboxylase
Scurvy presentation
Bleeding gums and hair follicles
Cori’s
Debranching enzyme deficiencyShort branches of glycogen
Dehydrogenase
Removes H with cofactor
Diseases associated with AA Synthesis/Metabolism
Hartnup’s, PKU, Alkaptonuria, Homocysteinuria, Cystinuria, MSUD, Propionyl-CoA Carboxylase deficiency, Methylmalonyl-CoA Mutase deficiency
Galactosuria
Galactokinase deficiency Cataracts
Sandhoff’s
Hexosaminidase A/B deficiencyWorse
Sythase
Consumes 2 substrates
Endothermic reaction
Consumes heat
N-bond AA
Asparagine Glutamine
McArdle’s
Muscle phosphorylase deficiencyMuscle cramps with exercise
Diseases associated with Lipoprotein Transport/Metabolism
Hyperlipidemias
Carnitine Shuttle
FA transport into mitochondria
RLE FA Synthesis
Acetyl CoA Carboxylase
What AAs do Trypsin cut?
Lysine Arginine
What does THF donate methyl groups to?
Nucleotides
Epimerase
Differs around 1 chiral carbonGlucose –> Galactose
MSUD
Defective metabolism of branched chain AADefect in nephron transport system
What is efficacy and what affects it?
Max effect regardless of doseVmax
RLE Glycogenesis
Glycogen Sythase
Smallest AA
Glycine
Most common intracellular buffer
Protein
Diseases associated with AA derivatives
AlbinismCarcinoidAcute Intermittent PorphyriaPorphyria Cutanea TardisLead PoisoningHemolytic Anemia UDP Glucoronyl Transferase
What does Mercaptoethanol cut?
Right of Cysteine and Methionine
Anterior leg bowing
Neonatal syphilis
What does Biotin donate methyl groups to?
Carboxylation
Disulfide bond making AA
Cysteine Methionine
What is potency and what affects it?
Amount of drug needed to produce effectKm
Silent Mutation
Change base, codes for same AA
Thio
Breaks S bond
Diseases associated with Lipid Derivatives
Tay SachsNiemann PickGaucherFabryMetachromatic LeukodystrophyHunter (MPS II)Hurler (MPS I)
Hartnup’s
Tryptophan deficiency No niacin or serotonin Pellagra-like presentation Corn-rich diet
Hurler’s
Iduronidase deficiency ARWorse (MPS I)
Niemann Pick
Sphingomyelinase deficiency Zebra bodiesOrganomegaly
Glucogenic
Made from and broken down to anything but Acetyl CoA
What does Elastase cut?
Right of Glycine, Alanine, Serine
Where does the Mannose-6-P send stuff to?
Lysosome
AA used to make CYS
Methionine
Acidic AA
AspartateGlutamate
Isomerase
Same chemical make up but different structureGlucose –> Fructose
Minky Kinky Hair presentation
Cu deficiency Hair looks like Cu wire
Transition Mutation
Pur –> Pur
4 types of Collagen
SCABType I: Skin, BoneType II: CT, Aqueous HumorType III: ArteriesType IV: Basement Membrane
Metachromatic Leukodystrophy
Arylsulfatase deficiency Childhood MS
O-bond AA
SerineThreonineTyrosine
Best AA buffer in the body
Histidine
Missense Mutation
Change base, codes for different AA
Purines
A, G
Kinase
Phosphorylates using ATP
Citrate Shuttle
FA transport out of mitochondria
Basic AA
Lysine Arginine
Most common extracellular buffer
Bicarbonate
Diseases associated with Glycogenesis/Glycogenolysis
Von Gierke’sPompe’sCori’sAnderson’sMcArdle’s
Lyase
Cuts C-C bonds using ATP
Takayasu Arteritis presentation
Asian female with very weak pulsesGranulomatous arteritis
Pompe’s
Alpha-1,4-glucosidase deficiencyCardiac
Lysosomal diseases with cherry red spot
Tay Sachs Niemann Pick
Branched AA
LeucineIsoleucineValine
RLE Cholesterol Synthesis
HMG CoA Reductase
Competitive Inhibition
Binds at active site, potency decreases, Km increases
Where does the Pre label send stuff to?
ER
Krabbe’s
Beta-galactosidase deficiencyGloboid bodies NeuropathyEye issues
Transversion Mutation
Pur –> Pyr
RLE Pyrimidine Synthesis
ASP Transcarbamoylase
What AAs do Beta-ME cut?
Cysteine Methionine
Transferase
Extrachain movement of sidechain from 1 substrate to another
AA causes kinks
Proline
Homocysteinuria presentation
Marfanoid Dislocated lens from the top (look down)
Northern Blot
RNA
Sulfur containing AA
Cysteine Methionine
Fructosemia
Aldolase B deficiency Fructose intolertanceLiver damage
Diseases associated with Glycolysis
GalactosuriaGalactosemiaFructosuriaFructosemiaPyruvate Kinase deficiency
RLE Heme Synthesis
Delta-ala Synthase
Tay Sachs
Hexosaminidase A deficiency BlindnessIncoordinationDementiaNO organomegaly
Catecholamine making AA
Tyrosine
Zero Order Kinetics
Constant drug amount metabolized over timeIndependent of concentration
Aromatic AA
PhenylalanineTyrosineTryptophan
RLE Ketogenesis
HMG CoA Synthase
Phosphorylase
Phosphorylates using Pi
Diseases associated with HMP Shunt
G6PD deficiency
Trough level
2 hours before dose (if too high, give less often)
What does Alpha-1-antitrypsin do?
Inhibit trypsin from getting loose
Synthetase
Consumes 2 substrates using ATP
Fabry’s
Alpha-galactosidase deficiency X-linkedCorneal clouding Attacks baby’s kidneys
RLE Glycolysis
PFK-1
RLE TCA Cycle
Isocitrate Dehydrogenase
White diaper crystals
Excess orotic acid
Kwashiorkor
Protein deficiency Ascities (big belly)Malabsorption
PKU
Phenylalanine hydroxylase deficiency No phenylalanine to tyrosine - deficient in tyrosine (blonde, blue eyes, fair skin)Build up of phenyl-pyruvate/acetate (musty odor)MRNutrisweet sensitivity
Mutase
Intrachain movement of sidechain from 1 C to another
Excitatory for CNS AA
Asparagine
Homocystinuria
No homocysteine to cysteine Results in “COLA” stonesCysteineOrnithine LysineArginine
Phosphatase
Breaks P bond
What AA turns yellow on Nihydrin Reaction?
Proline
Half Life (t1/2)
Time it takes for the body to use half of the drug ingested
What does SAM donate methyl groups to?
Everything else (not carboxylation or nucleotides)
Pyrimidines
C, U, T
EC 50
Concentration of drug that produces 50% of maximal response
RLE HMP Shunt
G6PD