Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5887
Number of amino acids:92
Molecular Weight:10875.97 Da
Theoretical pI:9.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.17%
Cysteine CYS (C)1010.87%
Glutamic Acid GLU (E)22.17%
Aspartic Acid ASP (D)55.43%
Glycine GLY (G)44.35%
Phynylalanine PHE (F)66.52%
Isoleucine ILE (I)44.35%
Histidine HIS (H)22.17%
Lysine LYS (K)1010.87%
Methionine MET (M)33.26%
Leucine LEU (L)66.52%
Asparagine ASN (N)55.43%
Glutamine GLN (Q)44.35%
Proline PRO (P)44.35%
Serine SER (S)11.09%
Arginine ARG (R)88.7%
Threonine THR (T)44.35%
Tryptophan TRP (W)00%
Valine VAL (V)88.7%
Tyrosine TYR (Y)44.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC478
HydrogenH765
NitrogenN139
OxygenO125
SulphurS13

FormulaC478H765N139O125S13
Total Number of Atoms:1520


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6585
Absorption 0.1% (=1 g/l)    0.605,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.548,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.43, 15.22, 14.13]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:69.7826
Grand average of hydropathicity (GRAVY):-0.31