GPA2/YER020W Additional Physico-chemical Properties Help

Physico-chemical properties were determined using the ProtParam tool available through ExPASy to analyze the primary protein sequence for atomic composition, extinction coefficient, estimated half-life, instability index and aliphatic index. Transcript translation calculations were determined using CodonW.


A.A. Composition
Ala[A] 25 5.6%
Arg[R] 21 4.7%
Asn[N] 35 7.8%
Asp[D] 25 5.6%
Cys[C] 4 0.9%
Gln[Q] 35 7.8%
Glu[E] 24 5.3%
Gly[G] 22 4.9%
His[H] 5 1.1%
Ile[I] 28 6.2%
Leu[L] 38 8.5%
Lys[K] 25 5.6%
Met[M] 10 2.2%
Phe[F] 17 3.8%
Pro[P] 20 4.5%
Ser[S] 42 9.4%
Thr[T] 31 6.9%
Trp[W] 4 0.9%
Tyr[Y] 13 2.9%
Val[V] 25 5.6%
Total Length 449

Instability index
Instability index (II) 50.10
This classifies the protein as unstable

Atomic composition
Carbon 2207
Hydrogen 3501
Nitrogen 621
Oxygen 704
Sulfur 14
Total number of atoms 7047
Formula = C2207H3501N621O704S14

Estimated half-life
Escherichia coli (in vivo) >10 hours
mammalian reticulocytes (in vitro) 30 hours
yeast (in vivo) >20 hours

Extinction Coefficients at 280 nm
assuming ALL Cys residues appear as half cystines 41620 M-1 cm-1
assuming NO Cys residues appear as half cystines 41370 M-1 cm-1
assuming all Cys residues are reduced 41370 M-1 cm-1
assuming all pairs of Cys residues form cystines 41620 M-1 cm-1

Aliphatic index
Aliphatic index 79.04

Coding Region Translation Calculations
Codon Bias 0.060
Codon Adaptation Index 0.100
Frequency of Optimal Codons 0.446
Hydropathicity of Protein -0.544
Aromaticity Score 0.076