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Ph Ch 128 2nd Exam > Shikimate Pathway > Flashcards

Shikimate Pathway Flashcards

0
Q

Building block of shikimate pathway

A

C6C3 phenylpropane unit

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1
Q

Central intermediate in shikimate pathway

A

Shikimic acid

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2
Q

Building block for alkaloidal structures

A

L-Trp

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3
Q

Precursors of L-DOPA and DOPAchrome

A

L-Phe and L-Tyr

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4
Q

Precursor of catecholamines

A

L-dopa

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5
Q

Precursor of melanin

A

Dopachrome

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6
Q

Precursor of tannins

A

Gallic acid

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7
Q

Plant polyphenols which has the ability to precipitate proteins

A

Tannins

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8
Q

Botanical origin of witch hazel leaves

A

Hamamelis virginiana

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9
Q

Botanical origin of nutgall

A

Rhus chinensis

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10
Q

Botanical origin of mangrove

A

Rhizophora mangle

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11
Q

Color formed upon rxn with ferric salts

A

Dark blue (H) to greenish black (NH)

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12
Q

Color formed upon rxn with potassium ferricyanide and ammonia

A

Deep red

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13
Q

Types of tannins

A

Hydrolyzable and non-hydrolyzable

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14
Q

Other name for hydrolyzable tannins

A

Pyrogallotannins

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15
Q

Intermediate where pyrogallotannins are derived

A

Dehydroshikimic acid

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16
Q

Classes of hydrolyzable tannins

A

Gallotannins and ellagitannins

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17
Q

Esters of gallic acid with polyalcohol typically glucose

A

Gallotannins

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18
Q

Hexahydroxydiphenic acid esters by oxidative coupling of neighboring gallic units attached to D-glucose

A

Ellagitannins

19
Q

Gallotannins arise from ?

A

Quinic acid

20
Q

Other names for non-hydrolyzable tannins

A

Condensed tannins, proanthocyanidins, pycnogenols, leucoanthocyanidins

21
Q

Non-hydrolyzable are derived from ?

A

Flavonoid precursors

22
Q

Product of polymerization of nonhydrolyzable tannins

A

Phlobaphenes

23
Q

Test for total tannin analysis

A

Goldbeater’s skin test/Heme analysis

24
Q

Color of spot of tannins in short UV light

A

Dark purple

25
Q

Color formed upon rxn with Folin-Ciocalteu reagents

A

Blue spots

26
Q

Color formed upon reaction of tannins with NH3 vapor

A

Blue to gray spot

27
Q

Uses of tannins

A

Leather industry, antidote for alkaloidal poisoning, astringent, ink industry

28
Q

Most permanent black ink made by mixing iron salt with gallic acid and tannin in water to form ferous tannate

A

Iron-gall ink

29
Q

Formed when little ferrous tannate ink dries

A

Black insoluble ferric tannate

30
Q

Other names for folic acid

A

Folacin, pteroylglutamic acid, vit B9

31
Q

Conjugate of pteridine deriv, PABA, and glutamic acid

A

Folic acid

32
Q

Folic acid deficiency

A

Megaloblastic anemia

33
Q

Functions via a series of folate coenzymes as a carrier of one-carbon groups which are involved in amino acid and nucleotide metab

A

Tetrahydrofolic acid

34
Q

Folic acid inhibitors

A

Sulfanilamide and other antibacterial sulpha drugs, trimethoprim, pyrimethamine, methotrexate

35
Q

Inhibit dihydropteroate synthase

A

Sulfanilamide and other antibacterial sulpha drugs

36
Q

Enzyme incorporating PABA

A

Dihydropteroate synthase

37
Q

Antibacterial; Inhibit dihydrofolate reductase

A

Trimethoprim

38
Q

Antimalarial; inhibit dihydrofolate reductase

A

Pyrimethamine

39
Q

Blocks or prevents DNA methylation; blocks pyrimidine biosynthesis

A

Methotrexate

40
Q

Counteract folate-antagonist action of anticancer agent

A

N5-formyl-tetrahydrofolic acid or folinic acid or leucovorin

41
Q

Isolated from Streptomyces venezuelae; one of first broad spectrum antibiotics; can cause blood disorders

A

Chloramphenicol

42
Q

Enzyme that catalyzes peptide bond formation

A

Peptidyl transferase

43
Q

Shikimic acid is synthesis blah blah of antiviral what

A

Oseltamivir

44
Q

Inhibitor of EPSP synthase

A

Glyphosate

45
Q

MOA of chloramphenicol

A

Block peptidyl transferase

Ph Ch 128 2nd Exam (7 decks)

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