PIR1/YKL164C 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] 54 15.8%
Arg[R] 3 0.9%
Asn[N] 9 2.6%
Asp[D] 17 5.0%
Cys[C] 4 1.2%
Gln[Q] 32 9.4%
Glu[E] 5 1.5%
Gly[G] 32 9.4%
His[H] 2 0.6%
Ile[I] 31 9.1%
Leu[L] 14 4.1%
Lys[K] 18 5.3%
Met[M] 2 0.6%
Phe[F] 5 1.5%
Pro[P] 14 4.1%
Ser[S] 25 7.3%
Thr[T] 50 14.7%
Trp[W] 2 0.6%
Tyr[Y] 8 2.3%
Val[V] 14 4.1%
Total Length 341

Instability index
Instability index (II) 29.06
This classifies the protein as stable

Atomic composition
Carbon 1499
Hydrogen 2433
Nitrogen 415
Oxygen 510
Sulfur 6
Total number of atoms 4863
Formula = C1499H2433N415O510S6

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 23170 M-1 cm-1
assuming NO Cys residues appear as half cystines 22920 M-1 cm-1
assuming all Cys residues are reduced 22920 M-1 cm-1
assuming all pairs of Cys residues form cystines 23170 M-1 cm-1

Aliphatic index
Aliphatic index 79.21

Coding Region Translation Calculations
Codon Bias 0.611
Codon Adaptation Index 0.519
Frequency of Optimal Codons 0.772
Hydropathicity of Protein -0.107
Aromaticity Score 0.044