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7/24/2019 Proteins (Jenny)
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PREPARED BY: JENNY , HAZIERAH & SYAHIRAHPROTEINS
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State the elements in proteins
State the ario!s str!"t!re o# proteins
E$plain the #ormation an% rea'%o(n o#
%ipepti%es an% pol)pepti%eE$plain the meanin* o# essential amino a"i%
an% non amino a"i%s
+EARNIN O-T.O/E & OBJE.TI0E
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Protein are lar*e "omple$ or*ani" mole"!les(hi"h pla) %ierse roles in liin* or*anisms
Protein ma%e !p o# s!"h element as "aron,
h)%ro*en,o$)*en,nitro*en,s!lph!r an%phosphor!s1
Intro%!"tion
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7/24/2019 Proteins (Jenny)
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Protein so!r"e:
e**,
meat,mil',)o*h!rt an% et"
E$ample
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Primar) str!"t!re
Se"on%ar) str!"t!re
alpha2heli$
eta2pleate% sheettertiar) str!"t!re
3!arternar) str!"t!re
Protein str!"t!re
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The linear se4!en"e o# amino a"i% inpol)pepti%e "hain
a5 Primar) str!"t!re
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i1 alpha2heli$
2 6D arran*ement o# amino a"i%s (ith thepol)pepti%e "hain in a "or' s"re( shape
ii1 Beta 7 pleate% sheet2 Pol)pepti%es "hain are arran*e% si%e ) si%e
B5 Se"on%ar) str!"t!re
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7/24/2019 Proteins (Jenny)
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The oerall three %imensional shape o# apol)pepti%e "hain
"5 Tertiar) str!"t!re
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The "omination o# 8 or more tertiar)pol)pepti%es that ma'es !p a protein
%5 3!artenar) str!"t!re
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There hae 8 t)pe o# amino a"i%s:
I1 essential amino a"i%
II1 Non essential amino a"i%
. Essential amino acids are amino a"i%sthat "annot e s)nthesise% ) theo%)1E$ample le!"ine
. Non essential amino a"i% are amino a"i%s
that "an e s)nthesi9e% ) the o%)1 Thereare 7non essential amino a"i%s1E$ample : alanine
Amino a"i%s