HST4/YDR191W 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] 14 3.8%
Arg[R] 24 6.5%
Asn[N] 22 5.9%
Asp[D] 22 5.9%
Cys[C] 10 2.7%
Gln[Q] 12 3.2%
Glu[E] 17 4.6%
Gly[G] 21 5.7%
His[H] 10 2.7%
Ile[I] 20 5.4%
Leu[L] 40 10.8%
Lys[K] 29 7.8%
Met[M] 9 2.4%
Phe[F] 16 4.3%
Pro[P] 23 6.2%
Ser[S] 29 7.8%
Thr[T] 16 4.3%
Trp[W] 0 0.0%
Tyr[Y] 10 2.7%
Val[V] 26 7.0%
Total Length 370

Instability index
Instability index (II) 35.78
This classifies the protein as stable

Atomic composition
Carbon 1848
Hydrogen 2975
Nitrogen 525
Oxygen 538
Sulfur 19
Total number of atoms 5905
Formula = C1848H2975N525O538S19

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 15525 M-1 cm-1
assuming NO Cys residues appear as half cystines 14900 M-1 cm-1
assuming all Cys residues are reduced 14900 M-1 cm-1
assuming all pairs of Cys residues form cystines 15525 M-1 cm-1

Aliphatic index
Aliphatic index 87.41

Coding Region Translation Calculations
Codon Bias 0.013
Codon Adaptation Index 0.123
Frequency of Optimal Codons 0.404
Hydropathicity of Protein -0.373
Aromaticity Score 0.070