SSA1/YAL005C 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] 60 9.3%
Arg[R] 26 4.0%
Asn[N] 32 5.0%
Asp[D] 49 7.6%
Cys[C] 3 0.5%
Gln[Q] 23 3.6%
Glu[E] 51 7.9%
Gly[G] 50 7.8%
His[H] 5 0.8%
Ile[I] 40 6.2%
Leu[L] 48 7.5%
Lys[K] 53 8.3%
Met[M] 8 1.2%
Phe[F] 28 4.4%
Pro[P] 28 4.4%
Ser[S] 41 6.4%
Thr[T] 45 7.0%
Trp[W] 1 0.2%
Tyr[Y] 10 1.6%
Val[V] 41 6.4%
Total Length 642

Instability index
Instability index (II) 32.09
This classifies the protein as stable

Atomic composition
Carbon 3056
Hydrogen 4905
Nitrogen 839
Oxygen 994
Sulfur 11
Total number of atoms 9805
Formula = C3056H4905N839O994S11

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 20525 M-1 cm-1
assuming NO Cys residues appear as half cystines 20400 M-1 cm-1
assuming all Cys residues are reduced 20400 M-1 cm-1
assuming all pairs of Cys residues form cystines 20525 M-1 cm-1

Aliphatic index
Aliphatic index 81.32

Coding Region Translation Calculations
Codon Bias 0.763
Codon Adaptation Index 0.712
Frequency of Optimal Codons 0.859
Hydropathicity of Protein -0.438
Aromaticity Score 0.061