Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6040
Number of amino acids:100
Molecular Weight:10220.82 Da
Theoretical pI:7.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1616%
Cysteine CYS (C)99%
Glutamic Acid GLU (E)22%
Aspartic Acid ASP (D)11%
Glycine GLY (G)77%
Phynylalanine PHE (F)22%
Isoleucine ILE (I)22%
Histidine HIS (H)11%
Lysine LYS (K)33%
Methionine MET (M)33%
Leucine LEU (L)1111%
Asparagine ASN (N)1111%
Glutamine GLN (Q)55%
Proline PRO (P)44%
Serine SER (S)88%
Arginine ARG (R)11%
Threonine THR (T)44%
Tryptophan TRP (W)11%
Valine VAL (V)88%
Tyrosine TYR (Y)11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC433
HydrogenH703
NitrogenN125
OxygenO136
SulphurS12

FormulaC433H703N125O136S12
Total Number of Atoms:1409


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.733,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.684,   assuming all CYS residues are reduced
Aromaticity:0.040

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 30.00, 32.00]

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:89.9
Grand average of hydropathicity (GRAVY):0.41