Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4308
Number of amino acids:933
Molecular Weight:104688.86 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)566%
Cysteine CYS (C)111.18%
Glutamic Acid GLU (E)444.72%
Aspartic Acid ASP (D)485.14%
Glycine GLY (G)667.07%
Phynylalanine PHE (F)586.22%
Isoleucine ILE (I)576.11%
Histidine HIS (H)161.71%
Lysine LYS (K)535.68%
Methionine MET (M)293.11%
Leucine LEU (L)9410.08%
Asparagine ASN (N)444.72%
Glutamine GLN (Q)252.68%
Proline PRO (P)404.29%
Serine SER (S)798.47%
Arginine ARG (R)515.47%
Threonine THR (T)505.36%
Tryptophan TRP (W)161.71%
Valine VAL (V)707.5%
Tyrosine TYR (Y)262.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4736
HydrogenH7400
NitrogenN1256
OxygenO1342
SulphurS40

FormulaC4736H7400N1256O1342S40
Total Number of Atoms:14774


Total number of positively charged residues (ARG + LYS):104
Total number of negatively charged residues (ASP + GLU):92
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    127365
Absorption 0.1% (=1 g/l)    1.217,   assuming all pairs of CYS residues form cystines

Ext. coefficient    126740
Absorption 0.1% (=1 g/l)    1.211,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.41, 24.54, 23.90]

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:90.8788
Grand average of hydropathicity (GRAVY):-0.04