Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4214
Number of amino acids:396
Molecular Weight:42709.2 Da
Theoretical pI:5.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)348.59%
Cysteine CYS (C)92.27%
Glutamic Acid GLU (E)184.55%
Aspartic Acid ASP (D)287.07%
Glycine GLY (G)4010.1%
Phynylalanine PHE (F)143.54%
Isoleucine ILE (I)256.31%
Histidine HIS (H)71.77%
Lysine LYS (K)194.8%
Methionine MET (M)82.02%
Leucine LEU (L)307.58%
Asparagine ASN (N)256.31%
Glutamine GLN (Q)123.03%
Proline PRO (P)164.04%
Serine SER (S)287.07%
Arginine ARG (R)205.05%
Threonine THR (T)225.56%
Tryptophan TRP (W)71.77%
Valine VAL (V)287.07%
Tyrosine TYR (Y)61.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1866
HydrogenH2951
NitrogenN533
OxygenO582
SulphurS17

FormulaC1866H2951N533O582S17
Total Number of Atoms:5949


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    47940
Absorption 0.1% (=1 g/l)    1.122,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47440
Absorption 0.1% (=1 g/l)    1.111,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.78, 27.53, 22.73]

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:83.2576
Grand average of hydropathicity (GRAVY):-0.22