Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4957
Number of amino acids:534
Molecular Weight:58556.17 Da
Theoretical pI:5.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)7614.23%
Cysteine CYS (C)61.12%
Glutamic Acid GLU (E)325.99%
Aspartic Acid ASP (D)366.74%
Glycine GLY (G)458.43%
Phynylalanine PHE (F)173.18%
Isoleucine ILE (I)81.5%
Histidine HIS (H)203.75%
Lysine LYS (K)132.43%
Methionine MET (M)112.06%
Leucine LEU (L)478.8%
Asparagine ASN (N)152.81%
Glutamine GLN (Q)142.62%
Proline PRO (P)213.93%
Serine SER (S)397.3%
Arginine ARG (R)325.99%
Threonine THR (T)203.75%
Tryptophan TRP (W)112.06%
Valine VAL (V)397.3%
Tyrosine TYR (Y)325.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2604
HydrogenH3921
NitrogenN723
OxygenO791
SulphurS17

FormulaC2604H3921N723O791S17
Total Number of Atoms:8056


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    108555
Absorption 0.1% (=1 g/l)    1.854,   assuming all pairs of CYS residues form cystines

Ext. coefficient    108180
Absorption 0.1% (=1 g/l)    1.847,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.62

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.84, 22.47, 31.09]

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:75.5805
Grand average of hydropathicity (GRAVY):-0.28