PPE1/YHR075C 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 6.2%
Arg[R] 15 3.8%
Asn[N] 22 5.5%
Asp[D] 28 7.0%
Cys[C] 4 1.0%
Gln[Q] 15 3.8%
Glu[E] 19 4.8%
Gly[G] 22 5.5%
His[H] 10 2.5%
Ile[I] 26 6.5%
Leu[L] 41 10.2%
Lys[K] 30 7.5%
Met[M] 4 1.0%
Phe[F] 26 6.5%
Pro[P] 14 3.5%
Ser[S] 38 9.5%
Thr[T] 26 6.5%
Trp[W] 7 1.8%
Tyr[Y] 7 1.8%
Val[V] 21 5.2%
Total Length 400

Instability index
Instability index (II) 31.67
This classifies the protein as stable

Atomic composition
Carbon 2020
Hydrogen 3147
Nitrogen 539
Oxygen 603
Sulfur 8
Total number of atoms 6317
Formula = C2020H3147N539O603S8

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 49180 M-1 cm-1
assuming NO Cys residues appear as half cystines 48930 M-1 cm-1
assuming all Cys residues are reduced 48930 M-1 cm-1
assuming all pairs of Cys residues form cystines 49180 M-1 cm-1

Aliphatic index
Aliphatic index 86.80

Coding Region Translation Calculations
Codon Bias -0.007
Codon Adaptation Index 0.126
Frequency of Optimal Codons 0.404
Hydropathicity of Protein -0.273
Aromaticity Score 0.100