PEP4/YPL154C 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] 32 7.9%
Arg[R] 6 1.5%
Asn[N] 18 4.4%
Asp[D] 26 6.4%
Cys[C] 4 1.0%
Gln[Q] 12 3.0%
Glu[E] 27 6.7%
Gly[G] 38 9.4%
His[H] 9 2.2%
Ile[I] 24 5.9%
Leu[L] 41 10.1%
Lys[K] 24 5.9%
Met[M] 4 1.0%
Phe[F] 24 5.9%
Pro[P] 19 4.7%
Ser[S] 26 6.4%
Thr[T] 28 6.9%
Trp[W] 4 1.0%
Tyr[Y] 21 5.2%
Val[V] 18 4.4%
Total Length 405

Instability index
Instability index (II) 26.35
This classifies the protein as stable

Atomic composition
Carbon 2023
Hydrogen 3059
Nitrogen 499
Oxygen 617
Sulfur 8
Total number of atoms 6206
Formula = C2023H3059N499O617S8

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 53540 M-1 cm-1
assuming NO Cys residues appear as half cystines 53290 M-1 cm-1
assuming all Cys residues are reduced 53290 M-1 cm-1
assuming all pairs of Cys residues form cystines 53540 M-1 cm-1

Aliphatic index
Aliphatic index 83.38

Coding Region Translation Calculations
Codon Bias 0.388
Codon Adaptation Index 0.355
Frequency of Optimal Codons 0.635
Hydropathicity of Protein -0.185
Aromaticity Score 0.121