Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4842
Number of amino acids:394
Molecular Weight:43476.4 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)256.35%
Cysteine CYS (C)102.54%
Glutamic Acid GLU (E)92.28%
Aspartic Acid ASP (D)235.84%
Glycine GLY (G)369.14%
Phynylalanine PHE (F)143.55%
Isoleucine ILE (I)246.09%
Histidine HIS (H)123.05%
Lysine LYS (K)225.58%
Methionine MET (M)92.28%
Leucine LEU (L)246.09%
Asparagine ASN (N)297.36%
Glutamine GLN (Q)82.03%
Proline PRO (P)205.08%
Serine SER (S)297.36%
Arginine ARG (R)164.06%
Threonine THR (T)225.58%
Tryptophan TRP (W)82.03%
Valine VAL (V)348.63%
Tyrosine TYR (Y)205.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1942
HydrogenH2981
NitrogenN533
OxygenO567
SulphurS19

FormulaC1942H2981N533O567S19
Total Number of Atoms:6042


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    74425
Absorption 0.1% (=1 g/l)    1.712,   assuming all pairs of CYS residues form cystines

Ext. coefficient    73800
Absorption 0.1% (=1 g/l)    1.697,   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 : 27.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.47, 28.93, 17.01]

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:78.8832
Grand average of hydropathicity (GRAVY):-0.22