Proteins summary
Proteins carbonshydrogens
oxygensnitrogens
monomers ofproteins functionalgroups
aminoacids
20possibleamino acidtypes 20different Rgroups
11 nonessential madebycellsbase
aminoacidsare bondedbypeptidebonds
acid formpolypeptidechains
formfromdehydration
synthesis
aminoacidsdifferdue tovariable R group remove H2Ofromcarboxy
group t amino group
azo
IfÉEntÉ E
peptidebond
aaminoacidsdipeptide
soaminoacidsoligopeptide
20 aminoacids polypeptide
specialcasesexplained
cysteine Han i coo proline
I
g as groupwinform own pigbondwothercysteineside The C aminogroupmissingan it
allowsaminoacidtofit
chain disulfidebridge in jiff easily causingcovalentbondtoform
protein functions
functional
enzymes acceleratebiochemicalruns salivaryamylase keratin fingernails hairfeathers
hormones regulatoryinsulingrowthhormone collagen connectivetissuesligamentsbonesskin
transportother substanceshemoglobin carrieson elastin skinelasticity
p
myosin structuralandfunctionalmusclemovement
Protein structures
1 primarystructure polypeptide
Egg peptide ten hydrogenbondingbeginsresultinginalphahelixorbetapleatedsheet
bond betweenn it co of backbone
w no
notaproteinyet proteinhasfunction examplemyoglobin alwaysonly2structure
amino acidsequence a helix
pyftwisted
backbone psheet
willdeterminehowprotein folds
manIitbondstoholdshape