Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4407
Number of amino acids:640
Molecular Weight:67904.41 Da
Theoretical pI:9.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)9615%
Cysteine CYS (C)50.78%
Glutamic Acid GLU (E)172.66%
Aspartic Acid ASP (D)335.16%
Glycine GLY (G)8413.13%
Phynylalanine PHE (F)192.97%
Isoleucine ILE (I)111.72%
Histidine HIS (H)132.03%
Lysine LYS (K)233.59%
Methionine MET (M)132.03%
Leucine LEU (L)538.28%
Asparagine ASN (N)274.22%
Glutamine GLN (Q)233.59%
Proline PRO (P)304.69%
Serine SER (S)396.09%
Arginine ARG (R)426.56%
Threonine THR (T)213.28%
Tryptophan TRP (W)132.03%
Valine VAL (V)457.03%
Tyrosine TYR (Y)335.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3015
HydrogenH4636
NitrogenN878
OxygenO884
SulphurS18

FormulaC3015H4636N878O884S18
Total Number of Atoms:9431


Total number of positively charged residues (ARG + LYS):65
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    120920
Absorption 0.1% (=1 g/l)    1.781,   assuming all pairs of CYS residues form cystines

Ext. coefficient    120670
Absorption 0.1% (=1 g/l)    1.777,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.92

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.19, 28.12, 27.97]

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:74.3906
Grand average of hydropathicity (GRAVY):-0.23