Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4268
Number of amino acids:525
Molecular Weight:60798.5 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)356.67%
Cysteine CYS (C)122.29%
Glutamic Acid GLU (E)5510.48%
Aspartic Acid ASP (D)112.1%
Glycine GLY (G)315.9%
Phynylalanine PHE (F)356.67%
Isoleucine ILE (I)163.05%
Histidine HIS (H)112.1%
Lysine LYS (K)264.95%
Methionine MET (M)50.95%
Leucine LEU (L)285.33%
Asparagine ASN (N)315.9%
Glutamine GLN (Q)6211.81%
Proline PRO (P)244.57%
Serine SER (S)336.29%
Arginine ARG (R)387.24%
Threonine THR (T)193.62%
Tryptophan TRP (W)10.19%
Valine VAL (V)305.71%
Tyrosine TYR (Y)224.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2664
HydrogenH4085
NitrogenN781
OxygenO825
SulphurS17

FormulaC2664H4085N781O825S17
Total Number of Atoms:8372


Total number of positively charged residues (ARG + LYS):64
Total number of negatively charged residues (ASP + GLU):66
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39030
Absorption 0.1% (=1 g/l)    0.642,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38280
Absorption 0.1% (=1 g/l)    0.630,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 60.29

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.14, 22.67, 23.43]

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:55.9238
Grand average of hydropathicity (GRAVY):-0.91