Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4055
Number of amino acids:599
Molecular Weight:65670.34 Da
Theoretical pI:6.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6510.85%
Cysteine CYS (C)71.17%
Glutamic Acid GLU (E)305.01%
Aspartic Acid ASP (D)274.51%
Glycine GLY (G)457.51%
Phynylalanine PHE (F)254.17%
Isoleucine ILE (I)264.34%
Histidine HIS (H)284.67%
Lysine LYS (K)111.84%
Methionine MET (M)152.5%
Leucine LEU (L)427.01%
Asparagine ASN (N)294.84%
Glutamine GLN (Q)172.84%
Proline PRO (P)437.18%
Serine SER (S)335.51%
Arginine ARG (R)366.01%
Threonine THR (T)376.18%
Tryptophan TRP (W)81.34%
Valine VAL (V)549.02%
Tyrosine TYR (Y)213.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2932
HydrogenH4500
NitrogenN828
OxygenO851
SulphurS22

FormulaC2932H4500N828O851S22
Total Number of Atoms:9133


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):57
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75665
Absorption 0.1% (=1 g/l)    1.152,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75290
Absorption 0.1% (=1 g/l)    1.146,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.38, 25.04, 25.38]

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:81.2688
Grand average of hydropathicity (GRAVY):-0.15