SIF2/YBR103W 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] 27 5.0%
Arg[R] 15 2.8%
Asn[N] 34 6.4%
Asp[D] 38 7.1%
Cys[C] 5 0.9%
Gln[Q] 19 3.6%
Glu[E] 37 6.9%
Gly[G] 42 7.9%
His[H] 14 2.6%
Ile[I] 38 7.1%
Leu[L] 52 9.7%
Lys[K] 30 5.6%
Met[M] 7 1.3%
Phe[F] 15 2.8%
Pro[P] 13 2.4%
Ser[S] 55 10.3%
Thr[T] 27 5.0%
Trp[W] 12 2.2%
Tyr[Y] 15 2.8%
Val[V] 40 7.5%
Total Length 535

Instability index
Instability index (II) 28.80
This classifies the protein as stable

Atomic composition
Carbon 2617
Hydrogen 4089
Nitrogen 703
Oxygen 836
Sulfur 12
Total number of atoms 8257
Formula = C2617H4089N703O836S12

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 88600 M-1 cm-1
assuming NO Cys residues appear as half cystines 88350 M-1 cm-1
assuming all Cys residues are reduced 88350 M-1 cm-1
assuming all pairs of Cys residues form cystines 88600 M-1 cm-1

Aliphatic index
Aliphatic index 92.34

Coding Region Translation Calculations
Codon Bias -0.004
Codon Adaptation Index 0.108
Frequency of Optimal Codons 0.409
Hydropathicity of Protein -0.290
Aromaticity Score 0.079