ISC1/YER019W 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] 40 8.4%
Arg[R] 29 6.1%
Asn[N] 16 3.4%
Asp[D] 27 5.7%
Cys[C] 10 2.1%
Gln[Q] 20 4.2%
Glu[E] 25 5.2%
Gly[G] 27 5.7%
His[H] 16 3.4%
Ile[I] 32 6.7%
Leu[L] 50 10.5%
Lys[K] 23 4.8%
Met[M] 6 1.3%
Phe[F] 21 4.4%
Pro[P] 17 3.6%
Ser[S] 39 8.2%
Thr[T] 27 5.7%
Trp[W] 10 2.1%
Tyr[Y] 18 3.8%
Val[V] 24 5.0%
Total Length 477

Instability index
Instability index (II) 43.61
This classifies the protein as unstable

Atomic composition
Carbon 2422
Hydrogen 3761
Nitrogen 665
Oxygen 702
Sulfur 16
Total number of atoms 7566
Formula = C2422H3761N665O702S16

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 82445 M-1 cm-1
assuming NO Cys residues appear as half cystines 81820 M-1 cm-1
assuming all Cys residues are reduced 81820 M-1 cm-1
assuming all pairs of Cys residues form cystines 82445 M-1 cm-1

Aliphatic index
Aliphatic index 90.02

Coding Region Translation Calculations
Codon Bias 0.161
Codon Adaptation Index 0.134
Frequency of Optimal Codons 0.492
Hydropathicity of Protein -0.205
Aromaticity Score 0.103