Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4580
Number of amino acids:695
Molecular Weight:75225.05 Da
Theoretical pI:5.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)385.47%
Cysteine CYS (C)284.03%
Glutamic Acid GLU (E)253.6%
Aspartic Acid ASP (D)446.33%
Glycine GLY (G)608.63%
Phynylalanine PHE (F)426.04%
Isoleucine ILE (I)253.6%
Histidine HIS (H)101.44%
Lysine LYS (K)334.75%
Methionine MET (M)172.45%
Leucine LEU (L)497.05%
Asparagine ASN (N)436.19%
Glutamine GLN (Q)172.45%
Proline PRO (P)446.33%
Serine SER (S)9713.96%
Arginine ARG (R)223.17%
Threonine THR (T)365.18%
Tryptophan TRP (W)91.29%
Valine VAL (V)344.89%
Tyrosine TYR (Y)223.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3295
HydrogenH5015
NitrogenN883
OxygenO1049
SulphurS45

FormulaC3295H5015N883O1049S45
Total Number of Atoms:10287


Total number of positively charged residues (ARG + LYS):55
Total number of negatively charged residues (ASP + GLU):69
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84030
Absorption 0.1% (=1 g/l)    1.117,   assuming all pairs of CYS residues form cystines

Ext. coefficient    82280
Absorption 0.1% (=1 g/l)    1.094,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.04, 35.11, 18.56]

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:61.1799
Grand average of hydropathicity (GRAVY):-0.31