Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4129
Number of amino acids:731
Molecular Weight:82864.06 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)405.47%
Cysteine CYS (C)131.78%
Glutamic Acid GLU (E)395.34%
Aspartic Acid ASP (D)344.65%
Glycine GLY (G)648.76%
Phynylalanine PHE (F)304.1%
Isoleucine ILE (I)324.38%
Histidine HIS (H)182.46%
Lysine LYS (K)516.98%
Methionine MET (M)202.74%
Leucine LEU (L)516.98%
Asparagine ASN (N)425.75%
Glutamine GLN (Q)283.83%
Proline PRO (P)405.47%
Serine SER (S)506.84%
Arginine ARG (R)202.74%
Threonine THR (T)385.2%
Tryptophan TRP (W)304.1%
Valine VAL (V)537.25%
Tyrosine TYR (Y)385.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3767
HydrogenH5634
NitrogenN978
OxygenO1074
SulphurS33

FormulaC3767H5634N978O1074S33
Total Number of Atoms:11486


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):73
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    222370
Absorption 0.1% (=1 g/l)    2.684,   assuming all pairs of CYS residues form cystines

Ext. coefficient    221620
Absorption 0.1% (=1 g/l)    2.675,   assuming all CYS residues are reduced
Aromaticity:0.134

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.01, 26.81, 20.52]

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:70.7797
Grand average of hydropathicity (GRAVY):-0.40