Folate metabolism One carbon unit Flashcards

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1
Q

بسم الله الرحمن الرحيم وبه نستعين
الحمدلله الذي أنزل علي عبده الكتاب ولم يجعل له عوجا

ماهو تكوين حمض الفوليك ؟

A

Petridine
PABA
Glutmaic acid

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2
Q

ليه لازم تاخذ حمض الفوليك في الأكل ؟

A

عشان هو مش بيتصنع جوا الجسم ليه ؟
عشان
PABA is not synthesized in body and even if it is found it cannot be attached to Petridine and Glutamate

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3
Q

هو الفوليك مش بيتصنع جوا الجسم ليه ؟

A

عشان
PABA is not synthesized in body and even if it is found it cannot be attached to Petridine and Glutamate

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4
Q

Mention sources of Folate?

A

Liver
Yeast
Green leafy vegetables

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5
Q

the active form of folic acid is ?

A

Tetrahydrofolate by 2 reduction reactions

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6
Q

مساعد الانزيم في تكوين النشيط من الفوليك ؟

A

NADPH+H

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7
Q

ازاي اتكون
THF

A

تفاعلي اختزال للفوليك مع مساعد انزيم
NADPH+H

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8
Q

THF functions mentions?

A

PGSMC Synthesis
Purines
glycines
serine
methionine
Chloine

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9
Q

What results from Folate deficiency?

A

MHD
صعقت من دنياي في مهدي فتمنيت لحدي
Megaloblastic anemia
Homocystiemia
neural tube defects

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10
Q

sulfa drugs effect mention ?

A

تمنع تكوين الفوليك في البكتيريا
وبالتالي حمضها النووي
فهو مضاد حيوي

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11
Q

فكرة عمل مركبات السلفا علي البكتيريا

A

ان السلفاميثاكزول مثلا بيبقي قريب في الشكل من البابا
فيمنع تكوين الفوليك
يمنع تكوين الحمض النووي
تموت البكتيريا وشكرا

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12
Q

inhibitors of dihydrofolate reductases are?

A

Trimethoprim and methotrexate
___________________________

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13
Q

trimethoprim and methotrexate functions explain ?

A

Are inhibitors of dihydrofolate reductase enzyme preventing activation of folic acid and preventing synthesis of DNA even in rapidly dividing cells causes hair loss when taken as chemotheraputic drug anticancer drug

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14
Q

enzymes depending on folate mention 2 and their pathways

A

Thimydlylate synthease thymdine synthesis pyrmidine

purine sunthesis purine pathway

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15
Q

One carbon unit

A

وحدة كربون بتبقي موجود في اي مركب فيه كربونة واحدة وبيتم اعطائها لاي مركب اخري فيما يعرف ب
One carbon unit metabolism

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16
Q

One Carbon unit metabolism

A

هو عملية نقل وحدة كربون مفردة من مركب معطي لمركب مسقبل

17
Q

أولم ير الإنسان أنا خلقناه من نطفة

A

فإذا هو خصيم مبين

18
Q

Fully oxidized
Fully reduced

A

-CO2
-CH4 Methane

19
Q

وتطلب من عظيم كرمه قطرة

A

فيأبي إلا أن يجيبك بالمطر

20
Q

One carbon unit can be carried by 3 structres mention ,

A

TSB
Tetrahydrofolate - ch ch2 ch3 ch=-nh
S-adenosyl methionine CH3
Biotin (Co2)

21
Q

GR/ Co2 Carried by biotin is not one C pool ?

A

Because human cannot reduce Co2

22
Q

في سلايدين الدقيقة 13

A
23
Q

methylene group from where produced?

A

CH2 Produced by catabloism of serine to glycine and also catabolism of glycin giving methylene tetrahydrofolate

24
Q

mention 2 enzymes giving Metelne tetrahydroflate

A

ser hydroxy methy transferase
glycine clevage enzyme

25
Q

mention fate of methylene group CH2

A

1-Reduced to CH3 Metyl
2-Oxidized to CH Methenyl
3-Thymidylate TMP Synthesis

26
Q

the enzyme Thymidylate synthetase need a one carbon unit from /?

A

Methylene group in Methylene THF

27
Q

Histadine give ?

A

Methenyl group CH

28
Q

CH methenyl Come from ?

A

oxidized CH2 methylene

29
Q

Fate of CH OR Methenyl ?

A

Formyl group

30
Q

Fate of Formyl group mention

A

C2,8 IN Purines

31
Q

Mention sources of Methyl CH3

A

From Reduction of Methylene THF CH2
By Methylene THF Reductase
Irreversible Reaction

32
Q

ايه دور فيتامين ب 12 مع الفوليك ؟

A

Vitamin B12 work as the secretary for Methyl THF Accepting the methyl from it making methyl cobolamin then gives it to Homocystine in odrer to get Methionine

33
Q

one of manifetations of foilc acid deficincy is ? why?

A

homocystenima ?
لانه مستني الميثيل من الفوليك ثلاثي الهيدروجين يطيها للفيتامين ب 12 عشان يديها للهوموستايين عشان يكون ميثونين

34
Q

نقص الفيتامين ب 12 يؤدي إلي ؟
اشرح لي مصيدة القوليك
اشرح لي نتائج حدوث مصيدة الفوليك في الجسم

A

عند نقص الفيتامين ب12
حمض الفوليك مش لاقي حد ياخد منه الميثيل وبالتالي
حمض الفوليك كده اتورط معاه يعني مع الميثيل وبعدين مش لاقيين فوليك يمسك وحدة كربون تانية
بقا عندك مشكلتين
Homocysteemia
Non functional folate - Megaloblasticanemia DNA repressed synthesis

35
Q

methenyel come from methylene by ……….reaction and ……………..enzyme

A

Oxidation
NADP dehydrogenase