Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5128
Number of amino acids:335
Molecular Weight:34989.12 Da
Theoretical pI:4.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)308.96%
Cysteine CYS (C)92.69%
Glutamic Acid GLU (E)61.79%
Aspartic Acid ASP (D)175.07%
Glycine GLY (G)267.76%
Phynylalanine PHE (F)195.67%
Isoleucine ILE (I)216.27%
Histidine HIS (H)30.9%
Lysine LYS (K)51.49%
Methionine MET (M)30.9%
Leucine LEU (L)3610.75%
Asparagine ASN (N)319.25%
Glutamine GLN (Q)144.18%
Proline PRO (P)123.58%
Serine SER (S)4513.43%
Arginine ARG (R)102.99%
Threonine THR (T)278.06%
Tryptophan TRP (W)10.3%
Valine VAL (V)185.37%
Tyrosine TYR (Y)20.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1519
HydrogenH2414
NitrogenN422
OxygenO501
SulphurS12

FormulaC1519H2414N422O501S12
Total Number of Atoms:4868


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.257,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.242,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.96, 34.03, 22.39]

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:90.8956
Grand average of hydropathicity (GRAVY):0.13